diff --git a/wp-includes/sodium_compat/src/Compat.php b/wp-includes/sodium_compat/src/Compat.php
index b2ccd21ddf..cc6c92b92b 100644
--- a/wp-includes/sodium_compat/src/Compat.php
+++ b/wp-includes/sodium_compat/src/Compat.php
@@ -3533,9 +3533,13 @@ class ParagonIE_Sodium_Compat
                 );
             }
         }
+        /** @var positive-int $numBytes */
         if (self::use_fallback('randombytes_buf')) {
             return (string) call_user_func('\\Sodium\\randombytes_buf', $numBytes);
         }
+        if ($numBytes < 0) {
+            throw new SodiumException("Number of bytes must be a positive integer");
+        }
         return random_bytes($numBytes);
     }
 
diff --git a/wp-includes/sodium_compat/src/Core/BLAKE2b.php b/wp-includes/sodium_compat/src/Core/BLAKE2b.php
index 5251bafe71..6ad4ab7ce6 100644
--- a/wp-includes/sodium_compat/src/Core/BLAKE2b.php
+++ b/wp-includes/sodium_compat/src/Core/BLAKE2b.php
@@ -50,6 +50,9 @@ abstract class ParagonIE_Sodium_Core_BLAKE2b extends ParagonIE_Sodium_Core_Util
      */
     public static function new64($high, $low)
     {
+        if (PHP_INT_SIZE === 4) {
+            throw new SodiumException("Error, use 32-bit");
+        }
         $i64 = new SplFixedArray(2);
         $i64[0] = $high & 0xffffffff;
         $i64[1] = $low & 0xffffffff;
@@ -86,6 +89,9 @@ abstract class ParagonIE_Sodium_Core_BLAKE2b extends ParagonIE_Sodium_Core_Util
      */
     protected static function add64($x, $y)
     {
+        if (PHP_INT_SIZE === 4) {
+            throw new SodiumException("Error, use 32-bit");
+        }
         $l = ($x[1] + $y[1]) & 0xffffffff;
         return self::new64(
             (int) ($x[0] + $y[0] + (
@@ -119,6 +125,9 @@ abstract class ParagonIE_Sodium_Core_BLAKE2b extends ParagonIE_Sodium_Core_Util
      */
     protected static function xor64(SplFixedArray $x, SplFixedArray $y)
     {
+        if (PHP_INT_SIZE === 4) {
+            throw new SodiumException("Error, use 32-bit");
+        }
         if (!is_numeric($x[0])) {
             throw new SodiumException('x[0] is not an integer');
         }
@@ -147,6 +156,9 @@ abstract class ParagonIE_Sodium_Core_BLAKE2b extends ParagonIE_Sodium_Core_Util
      */
     public static function rotr64($x, $c)
     {
+        if (PHP_INT_SIZE === 4) {
+            throw new SodiumException("Error, use 32-bit");
+        }
         if ($c >= 64) {
             $c %= 64;
         }
@@ -164,8 +176,8 @@ abstract class ParagonIE_Sodium_Core_BLAKE2b extends ParagonIE_Sodium_Core_Util
         $l0 = 0;
         $c = 64 - $c;
 
+        /** @var int $c */
         if ($c < 32) {
-            /** @var int $h0 */
             $h0 = ((int) ($x[0]) << $c) | (
                 (
                     (int) ($x[1]) & ((1 << $c) - 1)
@@ -173,10 +185,8 @@ abstract class ParagonIE_Sodium_Core_BLAKE2b extends ParagonIE_Sodium_Core_Util
                     (32 - $c)
                 ) >> (32 - $c)
             );
-            /** @var int $l0 */
             $l0 = (int) ($x[1]) << $c;
         } else {
-            /** @var int $h0 */
             $h0 = (int) ($x[1]) << ($c - 32);
         }
 
@@ -184,12 +194,9 @@ abstract class ParagonIE_Sodium_Core_BLAKE2b extends ParagonIE_Sodium_Core_Util
         $c1 = 64 - $c;
 
         if ($c1 < 32) {
-            /** @var int $h1 */
             $h1 = (int) ($x[0]) >> $c1;
-            /** @var int $l1 */
             $l1 = ((int) ($x[1]) >> $c1) | ((int) ($x[0]) & ((1 << $c1) - 1)) << (32 - $c1);
         } else {
-            /** @var int $l1 */
             $l1 = (int) ($x[0]) >> ($c1 - 32);
         }
 
diff --git a/wp-includes/sodium_compat/src/Core/Curve25519.php b/wp-includes/sodium_compat/src/Core/Curve25519.php
index 7c31cfc925..dfcf26af02 100644
--- a/wp-includes/sodium_compat/src/Core/Curve25519.php
+++ b/wp-includes/sodium_compat/src/Core/Curve25519.php
@@ -342,6 +342,9 @@ abstract class ParagonIE_Sodium_Core_Curve25519 extends ParagonIE_Sodium_Core_Cu
         ParagonIE_Sodium_Core_Curve25519_Fe $f,
         ParagonIE_Sodium_Core_Curve25519_Fe $g
     ) {
+        // Ensure limbs aren't oversized.
+        $f = self::fe_normalize($f);
+        $g = self::fe_normalize($g);
         $f0 = $f[0];
         $f1 = $f[1];
         $f2 = $f[2];
@@ -476,6 +479,7 @@ abstract class ParagonIE_Sodium_Core_Curve25519 extends ParagonIE_Sodium_Core_Cu
         $f9g7_38 = self::mul($g7_19, $f9_2, 26);
         $f9g8_19 = self::mul($g8_19, $f9, 25);
         $f9g9_38 = self::mul($g9_19, $f9_2, 26);
+
         $h0 = $f0g0 + $f1g9_38 + $f2g8_19 + $f3g7_38 + $f4g6_19 + $f5g5_38 + $f6g4_19 + $f7g3_38 + $f8g2_19 + $f9g1_38;
         $h1 = $f0g1 + $f1g0    + $f2g9_19 + $f3g8_19 + $f4g7_19 + $f5g6_19 + $f6g5_19 + $f7g4_19 + $f8g3_19 + $f9g2_19;
         $h2 = $f0g2 + $f1g1_2  + $f2g0    + $f3g9_38 + $f4g8_19 + $f5g7_38 + $f6g6_19 + $f7g5_38 + $f8g4_19 + $f9g3_38;
@@ -530,18 +534,20 @@ abstract class ParagonIE_Sodium_Core_Curve25519 extends ParagonIE_Sodium_Core_Cu
         $h1 += $carry0;
         $h0 -= $carry0 << 26;
 
-        return ParagonIE_Sodium_Core_Curve25519_Fe::fromArray(
-            array(
-                (int) $h0,
-                (int) $h1,
-                (int) $h2,
-                (int) $h3,
-                (int) $h4,
-                (int) $h5,
-                (int) $h6,
-                (int) $h7,
-                (int) $h8,
-                (int) $h9
+        return self::fe_normalize(
+            ParagonIE_Sodium_Core_Curve25519_Fe::fromArray(
+                array(
+                    (int) $h0,
+                    (int) $h1,
+                    (int) $h2,
+                    (int) $h3,
+                    (int) $h4,
+                    (int) $h5,
+                    (int) $h6,
+                    (int) $h7,
+                    (int) $h8,
+                    (int) $h9
+                )
             )
         );
     }
@@ -563,7 +569,7 @@ abstract class ParagonIE_Sodium_Core_Curve25519 extends ParagonIE_Sodium_Core_Cu
         for ($i = 0; $i < 10; ++$i) {
             $h[$i] = -$f[$i];
         }
-        return $h;
+        return self::fe_normalize($h);
     }
 
     /**
@@ -578,6 +584,7 @@ abstract class ParagonIE_Sodium_Core_Curve25519 extends ParagonIE_Sodium_Core_Cu
      */
     public static function fe_sq(ParagonIE_Sodium_Core_Curve25519_Fe $f)
     {
+        $f = self::fe_normalize($f);
         $f0 = (int) $f[0];
         $f1 = (int) $f[1];
         $f2 = (int) $f[2];
@@ -711,18 +718,20 @@ abstract class ParagonIE_Sodium_Core_Curve25519 extends ParagonIE_Sodium_Core_Cu
         $h1 += $carry0;
         $h0 -= $carry0 << 26;
 
-        return ParagonIE_Sodium_Core_Curve25519_Fe::fromArray(
-            array(
-                (int) $h0,
-                (int) $h1,
-                (int) $h2,
-                (int) $h3,
-                (int) $h4,
-                (int) $h5,
-                (int) $h6,
-                (int) $h7,
-                (int) $h8,
-                (int) $h9
+        return self::fe_normalize(
+            ParagonIE_Sodium_Core_Curve25519_Fe::fromArray(
+                array(
+                    (int) $h0,
+                    (int) $h1,
+                    (int) $h2,
+                    (int) $h3,
+                    (int) $h4,
+                    (int) $h5,
+                    (int) $h6,
+                    (int) $h7,
+                    (int) $h8,
+                    (int) $h9
+                )
             )
         );
     }
@@ -740,6 +749,7 @@ abstract class ParagonIE_Sodium_Core_Curve25519 extends ParagonIE_Sodium_Core_Cu
      */
     public static function fe_sq2(ParagonIE_Sodium_Core_Curve25519_Fe $f)
     {
+        $f = self::fe_normalize($f);
         $f0 = (int) $f[0];
         $f1 = (int) $f[1];
         $f2 = (int) $f[2];
@@ -874,18 +884,20 @@ abstract class ParagonIE_Sodium_Core_Curve25519 extends ParagonIE_Sodium_Core_Cu
         $h1 += $carry0;
         $h0 -= $carry0 << 26;
 
-        return ParagonIE_Sodium_Core_Curve25519_Fe::fromArray(
-            array(
-                (int) $h0,
-                (int) $h1,
-                (int) $h2,
-                (int) $h3,
-                (int) $h4,
-                (int) $h5,
-                (int) $h6,
-                (int) $h7,
-                (int) $h8,
-                (int) $h9
+        return self::fe_normalize(
+            ParagonIE_Sodium_Core_Curve25519_Fe::fromArray(
+                array(
+                    (int) $h0,
+                    (int) $h1,
+                    (int) $h2,
+                    (int) $h3,
+                    (int) $h4,
+                    (int) $h5,
+                    (int) $h6,
+                    (int) $h7,
+                    (int) $h8,
+                    (int) $h9
+                )
             )
         );
     }
@@ -958,6 +970,7 @@ abstract class ParagonIE_Sodium_Core_Curve25519 extends ParagonIE_Sodium_Core_Cu
      */
     public static function fe_pow22523(ParagonIE_Sodium_Core_Curve25519_Fe $z)
     {
+        $z = self::fe_normalize($z);
         # fe_sq(t0, z);
         # fe_sq(t1, t0);
         # fe_sq(t1, t1);
@@ -1085,18 +1098,20 @@ abstract class ParagonIE_Sodium_Core_Curve25519 extends ParagonIE_Sodium_Core_Cu
      */
     public static function fe_sub(ParagonIE_Sodium_Core_Curve25519_Fe $f, ParagonIE_Sodium_Core_Curve25519_Fe $g)
     {
-        return ParagonIE_Sodium_Core_Curve25519_Fe::fromArray(
-            array(
-                (int) ($f[0] - $g[0]),
-                (int) ($f[1] - $g[1]),
-                (int) ($f[2] - $g[2]),
-                (int) ($f[3] - $g[3]),
-                (int) ($f[4] - $g[4]),
-                (int) ($f[5] - $g[5]),
-                (int) ($f[6] - $g[6]),
-                (int) ($f[7] - $g[7]),
-                (int) ($f[8] - $g[8]),
-                (int) ($f[9] - $g[9])
+        return self::fe_normalize(
+            ParagonIE_Sodium_Core_Curve25519_Fe::fromArray(
+                array(
+                    (int) ($f[0] - $g[0]),
+                    (int) ($f[1] - $g[1]),
+                    (int) ($f[2] - $g[2]),
+                    (int) ($f[3] - $g[3]),
+                    (int) ($f[4] - $g[4]),
+                    (int) ($f[5] - $g[5]),
+                    (int) ($f[6] - $g[6]),
+                    (int) ($f[7] - $g[7]),
+                    (int) ($f[8] - $g[8]),
+                    (int) ($f[9] - $g[9])
+                )
             )
         );
     }
@@ -2535,7 +2550,7 @@ abstract class ParagonIE_Sodium_Core_Curve25519 extends ParagonIE_Sodium_Core_Cu
         $s20 = 2097151 & (self::load_4(self::substr($s, 52, 4)) >> 4);
         $s21 = 2097151 & (self::load_3(self::substr($s, 55, 3)) >> 1);
         $s22 = 2097151 & (self::load_4(self::substr($s, 57, 4)) >> 6);
-        $s23 = (self::load_4(self::substr($s, 60, 4)) >> 3);
+        $s23 = 0x1fffffff & (self::load_4(self::substr($s, 60, 4)) >> 3);
 
         $s11 += self::mul($s23,  666643, 20);
         $s12 += self::mul($s23,  470296, 19);
@@ -3782,4 +3797,40 @@ abstract class ParagonIE_Sodium_Core_Curve25519 extends ParagonIE_Sodium_Core_Cu
         $s_[31] &= 128;
         return self::intArrayToString($s_);
     }
+
+    /**
+     * Ensure limbs are less than 28 bits long to prevent float promotion.
+     *
+     * This uses a constant-time conditional swap under the hood.
+     *
+     * @param ParagonIE_Sodium_Core_Curve25519_Fe $f
+     * @return ParagonIE_Sodium_Core_Curve25519_Fe
+     */
+    public static function fe_normalize(ParagonIE_Sodium_Core_Curve25519_Fe $f)
+    {
+        $x = (PHP_INT_SIZE << 3) - 1; // 31 or 63
+
+        $g = self::fe_copy($f);
+        for ($i = 0; $i < 10; ++$i) {
+            $mask = -(($g[$i] >> $x) & 1);
+
+            /*
+             * Get two candidate normalized values for $g[$i], depending on the sign of $g[$i]:
+             */
+            $a = $g[$i] & 0x7ffffff;
+            $b = -((-$g[$i]) & 0x7ffffff);
+
+            /*
+             * Return the appropriate candidate value, based on the sign of the original input:
+             *
+             * The following is equivalent to this ternary:
+             *
+             * $g[$i] = (($g[$i] >> $x) & 1) ? $a : $b;
+             *
+             * Except what's written doesn't contain timing leaks.
+             */
+            $g[$i] = ($a ^ (($a ^ $b) & $mask));
+        }
+        return $g;
+    }
 }
diff --git a/wp-includes/sodium_compat/src/Core/Util.php b/wp-includes/sodium_compat/src/Core/Util.php
index bde9df1106..13221b366c 100644
--- a/wp-includes/sodium_compat/src/Core/Util.php
+++ b/wp-includes/sodium_compat/src/Core/Util.php
@@ -458,7 +458,7 @@ abstract class ParagonIE_Sodium_Core_Util
         }
         /** @var array<int, int> $unpacked */
         $unpacked = unpack('V', $string);
-        return (int) ($unpacked[1] & 0xffffffff);
+        return (int) $unpacked[1];
     }
 
     /**
@@ -613,7 +613,11 @@ abstract class ParagonIE_Sodium_Core_Util
     {
         $high = 0;
         /** @var int $low */
-        $low = $num & 0xffffffff;
+        if (PHP_INT_SIZE === 4) {
+            $low = (int) $num;
+        } else {
+            $low = $num & 0xffffffff;
+        }
 
         if ((+(abs($num))) >= 1) {
             if ($num > 0) {
diff --git a/wp-includes/sodium_compat/src/Core32/Curve25519.php b/wp-includes/sodium_compat/src/Core32/Curve25519.php
index d6d700e0fa..aafffcd132 100644
--- a/wp-includes/sodium_compat/src/Core32/Curve25519.php
+++ b/wp-includes/sodium_compat/src/Core32/Curve25519.php
@@ -325,25 +325,15 @@ abstract class ParagonIE_Sodium_Core32_Curve25519 extends ParagonIE_Sodium_Core3
         $carry9 = $f[9]->shiftRight(25);
         $f[9] = $f[9]->subInt64($carry9->shiftLeft(25));
 
-        /** @var int $h0 */
         $h0 = $f[0]->toInt32()->toInt();
-        /** @var int $h1 */
         $h1 = $f[1]->toInt32()->toInt();
-        /** @var int $h2 */
         $h2 = $f[2]->toInt32()->toInt();
-        /** @var int $h3 */
         $h3 = $f[3]->toInt32()->toInt();
-        /** @var int $h4 */
         $h4 = $f[4]->toInt32()->toInt();
-        /** @var int $h5 */
         $h5 = $f[5]->toInt32()->toInt();
-        /** @var int $h6 */
         $h6 = $f[6]->toInt32()->toInt();
-        /** @var int $h7 */
         $h7 = $f[7]->toInt32()->toInt();
-        /** @var int $h8 */
         $h8 = $f[8]->toInt32()->toInt();
-        /** @var int $h9 */
         $h9 = $f[9]->toInt32()->toInt();
 
         /**
@@ -418,7 +408,6 @@ abstract class ParagonIE_Sodium_Core32_Curve25519 extends ParagonIE_Sodium_Core3
         if ($zero === null) {
             $zero = str_repeat("\x00", 32);
         }
-        /** @var string $str */
         $str = self::fe_tobytes($f);
         /** @var string $zero */
         return !self::verify_32($str, $zero);
@@ -497,15 +486,10 @@ abstract class ParagonIE_Sodium_Core32_Curve25519 extends ParagonIE_Sodium_Core3
         $g7_19 = $g7->mulInt(19, 5);
         $g8_19 = $g8->mulInt(19, 5);
         $g9_19 = $g9->mulInt(19, 5);
-        /** @var ParagonIE_Sodium_Core32_Int64 $f1_2 */
         $f1_2 = $f1->shiftLeft(1);
-        /** @var ParagonIE_Sodium_Core32_Int64 $f3_2 */
         $f3_2 = $f3->shiftLeft(1);
-        /** @var ParagonIE_Sodium_Core32_Int64 $f5_2 */
         $f5_2 = $f5->shiftLeft(1);
-        /** @var ParagonIE_Sodium_Core32_Int64 $f7_2 */
         $f7_2 = $f7->shiftLeft(1);
-        /** @var ParagonIE_Sodium_Core32_Int64 $f9_2 */
         $f9_2 = $f9->shiftLeft(1);
         $f0g0    = $f0->mulInt64($g0, 27);
         $f0g1    = $f0->mulInt64($g1, 27);
@@ -775,28 +759,17 @@ abstract class ParagonIE_Sodium_Core32_Curve25519 extends ParagonIE_Sodium_Core3
      */
     public static function fe_sq(ParagonIE_Sodium_Core32_Curve25519_Fe $f)
     {
-        /** @var ParagonIE_Sodium_Core32_Int64 $f0 */
         $f0 = $f[0]->toInt64();
-        /** @var ParagonIE_Sodium_Core32_Int64 $f1 */
         $f1 = $f[1]->toInt64();
-        /** @var ParagonIE_Sodium_Core32_Int64 $f2 */
         $f2 = $f[2]->toInt64();
-        /** @var ParagonIE_Sodium_Core32_Int64 $f3 */
         $f3 = $f[3]->toInt64();
-        /** @var ParagonIE_Sodium_Core32_Int64 $f4 */
         $f4 = $f[4]->toInt64();
-        /** @var ParagonIE_Sodium_Core32_Int64 $f5 */
         $f5 = $f[5]->toInt64();
-        /** @var ParagonIE_Sodium_Core32_Int64 $f6 */
         $f6 = $f[6]->toInt64();
-        /** @var ParagonIE_Sodium_Core32_Int64 $f7 */
         $f7 = $f[7]->toInt64();
-        /** @var ParagonIE_Sodium_Core32_Int64 $f8 */
         $f8 = $f[8]->toInt64();
-        /** @var ParagonIE_Sodium_Core32_Int64 $f9 */
         $f9 = $f[9]->toInt64();
 
-        /** @var ParagonIE_Sodium_Core32_Int64 $f0_2 */
         $f0_2 = $f0->shiftLeft(1);
         $f1_2 = $f1->shiftLeft(1);
         $f2_2 = $f2->shiftLeft(1);
@@ -810,7 +783,7 @@ abstract class ParagonIE_Sodium_Core32_Curve25519 extends ParagonIE_Sodium_Core3
         $f7_38 = $f7->mulInt(38, 6);
         $f8_19 = $f8->mulInt(19, 5);
         $f9_38 = $f9->mulInt(38, 6);
-        /** @var ParagonIE_Sodium_Core32_Int64 $f0f0*/
+
         $f0f0    = $f0->mulInt64($f0, 28);
         $f0f1_2  = $f0_2->mulInt64($f1, 28);
         $f0f2_2 =  $f0_2->mulInt64($f2, 28);
@@ -979,25 +952,15 @@ abstract class ParagonIE_Sodium_Core32_Curve25519 extends ParagonIE_Sodium_Core3
      */
     public static function fe_sq2(ParagonIE_Sodium_Core32_Curve25519_Fe $f)
     {
-        /** @var ParagonIE_Sodium_Core32_Int64 $f0 */
         $f0 = $f[0]->toInt64();
-        /** @var ParagonIE_Sodium_Core32_Int64 $f1 */
         $f1 = $f[1]->toInt64();
-        /** @var ParagonIE_Sodium_Core32_Int64 $f2 */
         $f2 = $f[2]->toInt64();
-        /** @var ParagonIE_Sodium_Core32_Int64 $f3 */
         $f3 = $f[3]->toInt64();
-        /** @var ParagonIE_Sodium_Core32_Int64 $f4 */
         $f4 = $f[4]->toInt64();
-        /** @var ParagonIE_Sodium_Core32_Int64 $f5 */
         $f5 = $f[5]->toInt64();
-        /** @var ParagonIE_Sodium_Core32_Int64 $f6 */
         $f6 = $f[6]->toInt64();
-        /** @var ParagonIE_Sodium_Core32_Int64 $f7 */
         $f7 = $f[7]->toInt64();
-        /** @var ParagonIE_Sodium_Core32_Int64 $f8 */
         $f8 = $f[8]->toInt64();
-        /** @var ParagonIE_Sodium_Core32_Int64 $f9 */
         $f9 = $f[9]->toInt64();
 
         $f0_2 = $f0->shiftLeft(1);
@@ -1479,7 +1442,6 @@ abstract class ParagonIE_Sodium_Core32_Curve25519 extends ParagonIE_Sodium_Core3
     {
         static $d = null;
         if (!$d) {
-            /** @var ParagonIE_Sodium_Core32_Curve25519_Fe $d */
             $d = ParagonIE_Sodium_Core32_Curve25519_Fe::fromArray(
                 array(
                     ParagonIE_Sodium_Core32_Int32::fromInt(self::$d[0]),
@@ -1495,6 +1457,7 @@ abstract class ParagonIE_Sodium_Core32_Curve25519 extends ParagonIE_Sodium_Core3
                 )
             );
         }
+        /** @var ParagonIE_Sodium_Core32_Curve25519_Fe $d */
 
         # fe_frombytes(h->Y,s);
         # fe_1(h->Z);
@@ -1833,7 +1796,14 @@ abstract class ParagonIE_Sodium_Core32_Curve25519 extends ParagonIE_Sodium_Core3
      */
     public static function equal($b, $c)
     {
-        return (int) ((($b ^ $c) - 1 & 0xffffffff) >> 31);
+        $b0 = $b & 0xffff;
+        $b1 = ($b >> 16) & 0xffff;
+        $c0 = $c & 0xffff;
+        $c1 = ($c >> 16) & 0xffff;
+
+        $d0 = (($b0 ^ $c0) - 1) >> 31;
+        $d1 = (($b1 ^ $c1) - 1) >> 31;
+        return ($d0 & $d1) & 1;
     }
 
     /**
@@ -1850,7 +1820,6 @@ abstract class ParagonIE_Sodium_Core32_Curve25519 extends ParagonIE_Sodium_Core3
             return $char < 0 ? 1 : 0;
         }
         /** @var string $char */
-        /** @var int $x */
         $x = self::chrToInt(self::substr($char, 0, 1));
         return (int) ($x >> 31);
     }
@@ -1956,7 +1925,6 @@ abstract class ParagonIE_Sodium_Core32_Curve25519 extends ParagonIE_Sodium_Core3
         }
 
         $bnegative = self::negative($b);
-        /** @var int $babs */
         $babs = $b - (((-$bnegative) & $b) << 1);
 
         $t = self::ge_precomp_0();
@@ -1964,7 +1932,7 @@ abstract class ParagonIE_Sodium_Core32_Curve25519 extends ParagonIE_Sodium_Core3
             $t = self::cmov(
                 $t,
                 $base[$pos][$i],
-                self::equal($babs, $i + 1)
+                -self::equal($babs, $i + 1)
             );
         }
         $minusT = new ParagonIE_Sodium_Core32_Curve25519_Ge_Precomp(
@@ -2230,9 +2198,7 @@ abstract class ParagonIE_Sodium_Core32_Curve25519 extends ParagonIE_Sodium_Core3
         $carry = 0;
         for ($i = 0; $i < 63; ++$i) {
             $e[$i] += $carry;
-            /** @var int $carry */
             $carry = $e[$i] + 8;
-            /** @var int $carry */
             $carry >>= 4;
             $e[$i] -= $carry << 4;
         }
@@ -3140,7 +3106,6 @@ abstract class ParagonIE_Sodium_Core32_Curve25519 extends ParagonIE_Sodium_Core3
      */
     public static function ge_mul_l(ParagonIE_Sodium_Core32_Curve25519_Ge_P3 $A)
     {
-        /** @var array<int, int> $aslide */
         $aslide = array(
             13, 0, 0, 0, 0, -1, 0, 0, 0, 0, -11, 0, 0, 0, 0, 0, 0, -5, 0, 0, 0,
             0, 0, 0, -3, 0, 0, 0, 0, -13, 0, 0, 0, 0, 7, 0, 0, 0, 0, 0, 3, 0,
diff --git a/wp-includes/sodium_compat/src/Core32/Curve25519/Fe.php b/wp-includes/sodium_compat/src/Core32/Curve25519/Fe.php
index 27537a6f1a..21b3188226 100644
--- a/wp-includes/sodium_compat/src/Core32/Curve25519/Fe.php
+++ b/wp-includes/sodium_compat/src/Core32/Curve25519/Fe.php
@@ -48,6 +48,9 @@ class ParagonIE_Sodium_Core32_Curve25519_Fe implements ArrayAccess
             }
         } else {
             for ($i = 0; $i < $count; ++$i) {
+                if (!($array[$i] instanceof ParagonIE_Sodium_Core32_Int32)) {
+                    throw new TypeError('Expected ParagonIE_Sodium_Core32_Int32');
+                }
                 $array[$i]->overflow = 0;
                 $obj->offsetSet($i, $array[$i]);
             }
diff --git a/wp-includes/sodium_compat/src/Core32/Int32.php b/wp-includes/sodium_compat/src/Core32/Int32.php
index c3a17900a5..81821556d4 100644
--- a/wp-includes/sodium_compat/src/Core32/Int32.php
+++ b/wp-includes/sodium_compat/src/Core32/Int32.php
@@ -138,9 +138,10 @@ class ParagonIE_Sodium_Core32_Int32
     public function mask($m = 0)
     {
         /** @var int $hi */
-        $hi = ($m >> 16) & 0xffff;
+        $hi = ((int) $m >> 16);
+        $hi &= 0xffff;
         /** @var int $lo */
-        $lo = ($m & 0xffff);
+        $lo = ((int) $m) & 0xffff;
         return new ParagonIE_Sodium_Core32_Int32(
             array(
                 (int) ($this->limbs[0] & $hi),
@@ -168,8 +169,8 @@ class ParagonIE_Sodium_Core32_Int32
             for ($j = 0; $j < $a_l; ++$j) {
                 $b_j = $b[$j];
                 $product = ($a_i * $b_j) + $r[$i + $j];
-                $carry = ($product >> $baseLog2 & 0xffff);
-                $r[$i + $j] = ($product - (int) ($carry * $base)) & 0xffff;
+                $carry = ((int) $product >> $baseLog2 & 0xffff);
+                $r[$i + $j] = ((int) $product - (int) ($carry * $base)) & 0xffff;
                 $r[$i + $j + 1] += $carry;
             }
         }
diff --git a/wp-includes/sodium_compat/src/Core32/Int64.php b/wp-includes/sodium_compat/src/Core32/Int64.php
index dd06a3fbeb..e94d798233 100644
--- a/wp-includes/sodium_compat/src/Core32/Int64.php
+++ b/wp-includes/sodium_compat/src/Core32/Int64.php
@@ -337,9 +337,9 @@ class ParagonIE_Sodium_Core32_Int64
             $a_i = $a[$i];
             for ($j = 0; $j < $a_l; ++$j) {
                 $b_j = $b[$j];
-                $product = ($a_i * $b_j) + $r[$i + $j];
-                $carry = ($product >> $baseLog2 & 0xffff);
-                $r[$i + $j] = ($product - (int) ($carry * $base)) & 0xffff;
+                $product = (($a_i * $b_j) + $r[$i + $j]);
+                $carry = (((int) $product >> $baseLog2) & 0xffff);
+                $r[$i + $j] = ((int) $product - (int) ($carry * $base)) & 0xffff;
                 $r[$i + $j + 1] += $carry;
             }
         }
diff --git a/wp-includes/sodium_compat/src/Core32/Poly1305/State.php b/wp-includes/sodium_compat/src/Core32/Poly1305/State.php
index d80e1ff981..e77a8f42ee 100644
--- a/wp-includes/sodium_compat/src/Core32/Poly1305/State.php
+++ b/wp-includes/sodium_compat/src/Core32/Poly1305/State.php
@@ -419,7 +419,7 @@ class ParagonIE_Sodium_Core32_Poly1305_State extends ParagonIE_Sodium_Core32_Uti
         $g4 = $g4->mask($mask);
 
         /** @var int $mask */
-        $mask = (~$mask) & 0xffffffff;
+        $mask = ~$mask;
 
         $h0 = $h0->mask($mask)->orInt32($g0);
         $h1 = $h1->mask($mask)->orInt32($g1);
diff --git a/wp-includes/sodium_compat/src/Core32/XChaCha20.php b/wp-includes/sodium_compat/src/Core32/XChaCha20.php
index 1dfc8591d7..404e8d2444 100644
--- a/wp-includes/sodium_compat/src/Core32/XChaCha20.php
+++ b/wp-includes/sodium_compat/src/Core32/XChaCha20.php
@@ -61,4 +61,27 @@ class ParagonIE_Sodium_Core32_XChaCha20 extends ParagonIE_Sodium_Core32_HChaCha2
             $message
         );
     }
+
+    /**
+     * @internal You should not use this directly from another application
+     *
+     * @param string $message
+     * @param string $nonce
+     * @param string $key
+     * @param string $ic
+     * @return string
+     * @throws SodiumException
+     * @throws TypeError
+     */
+    public static function ietfStreamXorIc($message, $nonce = '', $key = '', $ic = '')
+    {
+        return self::encryptBytes(
+            new ParagonIE_Sodium_Core32_ChaCha20_IetfCtx(
+                self::hChaCha20(self::substr($nonce, 0, 16), $key),
+                "\x00\x00\x00\x00" . self::substr($nonce, 16, 8),
+                $ic
+            ),
+            $message
+        );
+    }
 }
diff --git a/wp-includes/sodium_compat/src/File.php b/wp-includes/sodium_compat/src/File.php
index d71bc7e5ad..e8622c7eba 100644
--- a/wp-includes/sodium_compat/src/File.php
+++ b/wp-includes/sodium_compat/src/File.php
@@ -1154,19 +1154,15 @@ class ParagonIE_Sodium_File extends ParagonIE_Sodium_Core_Util
      */
     private static function sign_core32($filePath, $secretKey)
     {
-        /** @var int|bool $size */
         $size = filesize($filePath);
         if (!is_int($size)) {
             throw new SodiumException('Could not obtain the file size');
         }
-        /** @var int $size */
 
-        /** @var resource|bool $fp */
         $fp = fopen($filePath, 'rb');
         if (!is_resource($fp)) {
             throw new SodiumException('Could not open input file for reading');
         }
-        /** @var resource $fp */
 
         /** @var string $az */
         $az = hash('sha512', self::substr($secretKey, 0, 32), true);
@@ -1179,16 +1175,9 @@ class ParagonIE_Sodium_File extends ParagonIE_Sodium_Core_Util
         /** @var resource $hs */
         $hs = self::updateHashWithFile($hs, $fp, $size);
 
-        /** @var string $nonceHash */
         $nonceHash = hash_final($hs, true);
-
-        /** @var string $pk */
         $pk = self::substr($secretKey, 32, 32);
-
-        /** @var string $nonce */
         $nonce = ParagonIE_Sodium_Core32_Ed25519::sc_reduce($nonceHash) . self::substr($nonceHash, 32);
-
-        /** @var string $sig */
         $sig = ParagonIE_Sodium_Core32_Ed25519::ge_p3_tobytes(
             ParagonIE_Sodium_Core32_Ed25519::ge_scalarmult_base($nonce)
         );
@@ -1199,13 +1188,10 @@ class ParagonIE_Sodium_File extends ParagonIE_Sodium_Core_Util
         /** @var resource $hs */
         $hs = self::updateHashWithFile($hs, $fp, $size);
 
-        /** @var string $hramHash */
         $hramHash = hash_final($hs, true);
 
-        /** @var string $hram */
         $hram = ParagonIE_Sodium_Core32_Ed25519::sc_reduce($hramHash);
 
-        /** @var string $sigAfter */
         $sigAfter = ParagonIE_Sodium_Core32_Ed25519::sc_muladd($hram, $az, $nonce);
 
         /** @var string $sig */
@@ -1243,6 +1229,7 @@ class ParagonIE_Sodium_File extends ParagonIE_Sodium_Core_Util
         if (ParagonIE_Sodium_Core32_Ed25519::small_order($sig)) {
             throw new SodiumException('Signature is on too small of an order');
         }
+
         if ((self::chrToInt($sig[63]) & 224) !== 0) {
             throw new SodiumException('Invalid signature');
         }
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 82e7388e2a..dae47d1b34 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.0-alpha-52987';
+$wp_version = '6.0-alpha-52988';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.