diff --git a/ChangeLog-8.php b/ChangeLog-8.php
index 56cc60513..5e0f7aacc 100644
--- a/ChangeLog-8.php
+++ b/ChangeLog-8.php
@@ -599,6 +599,111 @@ changelog_header(8, $MINOR_VERSIONS);
 
 <a id="PHP_8_4"></a>
 
+<section class="version" id="8.4.16"><!-- {{{ 8.4.16 -->
+<h3>Version 8.4.16</h3>
+<b><?php release_date('18-Dec-2025'); ?></b>
+<ul><li>Core:
+<ul>
+  <li>Sync all boost.context files with release 1.86.0.</li>
+  <li>Fixed bug <?php githubissuel('php/php-src', 20435); ?> (SensitiveParameter doesn't work for named argument passing to variadic parameter).</li>
+  <li>Fixed bug <?php githubissuel('php/php-src', 20286); ?> (use-after-destroy during userland stream_close()).</li>
+</ul></li>
+<li>Bz2:
+<ul>
+  <li>Fix assertion failures resulting in crashes with stream filter object parameters.</li>
+</ul></li>
+<li>Date:
+<ul>
+  <li>Fix crashes when trying to instantiate uninstantiable classes via date static constructors.</li>
+</ul></li>
+<li>DOM:
+<ul>
+  <li>Fix memory leak when edge case is hit when registering xpath callback.</li>
+  <li>Fixed bug <?php githubissuel('php/php-src', 20395); ?> (querySelector and querySelectorAll requires elements in $selectors to be lowercase).</li>
+  <li>Fix missing NUL byte check on C14NFile().</li>
+</ul></li>
+<li>Fibers:
+<ul>
+  <li>Fixed bug <?php githubissuel('php/php-src', 20483); ?> (ASAN stack overflow with fiber.stack_size INI small value).</li>
+</ul></li>
+<li>FTP:
+<ul>
+  <li>Fixed bug <?php githubissuel('php/php-src', 20601); ?> (ftp_connect overflow on timeout).</li>
+</ul></li>
+<li>GD:
+<ul>
+  <li>Fixed bug <?php githubissuel('php/php-src', 20511); ?> (imagegammacorrect out of range input/output values).</li>
+  <li>Fixed bug <?php githubissuel('php/php-src', 20602); ?> (imagescale overflow with large height values).</li>
+</ul></li>
+<li>Intl:
+<ul>
+  <li>Fixed bug <?php githubissuel('php/php-src', 20426); ?> (Spoofchecker::setRestrictionLevel() error message suggests missing constants).</li>
+</ul></li>
+<li>LibXML:
+<ul>
+  <li>Fix some deprecations on newer libxml versions regarding input buffer/parser handling.</li>
+</ul></li>
+<li>MbString:
+<ul>
+  <li>Fixed bug <?php githubissuel('php/php-src', 20491); ?> (SLES15 compile error with mbstring oniguruma).</li>
+  <li>Fixed bug <?php githubissuel('php/php-src', 20492); ?> (mbstring compile warning due to non-strings).</li>
+</ul></li>
+<li>MySQLnd:
+<ul>
+  <li>Fixed bug <?php githubissuel('php/php-src', 20528); ?> (Regression breaks mysql connexion using an IPv6 address enclosed in square brackets).</li>
+</ul></li>
+<li>Opcache:
+<ul>
+  <li>Fixed bug <?php githubissuel('php/php-src', 20329); ?> (opcache.file_cache broken with full interned string buffer).</li>
+</ul></li>
+<li>PDO:
+<ul>
+  <li>Fixed <?php githubsecurityl('php/php-src', '8xr5-qppj-gvwj'); ?> (PDO quoting result null deref). (CVE-2025-14180)</li>
+</ul></li>
+<li>Phar:
+<ul>
+  <li>Fixed bug <?php githubissuel('php/php-src', 20442); ?> (Phar does not respect case-insensitiveness of __halt_compiler() when reading stub).</li>
+  <li>Fix broken return value of fflush() for phar file entries.</li>
+  <li>Fix assertion failure when fseeking a phar file out of bounds.</li>
+</ul></li>
+<li>PHPDBG:
+<ul>
+  <li>Fixed ZPP type violation in phpdbg_get_executable() and phpdbg_end_oplog().</li>
+</ul></li>
+<li>SPL:
+<ul>
+  <li>Fixed bug <?php githubissuel('php/php-src', 20614); ?> (SplFixedArray incorrectly handles references in deserialization).</li>
+</ul></li>
+<li>Standard:
+<ul>
+  <li>Fix memory leak in array_diff() with custom type checks.</li>
+  <li>Fixed bug <?php githubissuel('php/php-src', 20583); ?> (Stack overflow in http_build_query via deep structures).</li>
+  <li>Fixed <?php githubsecurityl('php/php-src', 'www2-q4fc-65wf'); ?> (Null byte termination in dns_get_record()).</li>
+  <li>Fixed <?php githubsecurityl('php/php-src', 'h96m-rvf9-jgm2'); ?> (Heap buffer overflow in array_merge()). (CVE-2025-14178)</li>
+  <li>Fixed <?php githubsecurityl('php/php-src', '3237-qqm7-mfv7'); ?> (Information Leak of Memory in getimagesize). (CVE-2025-14177)</li>
+</ul></li>
+<li>Tidy:
+<ul>
+  <li>Fixed bug <?php githubissuel('php/php-src', 20374); ?> (PHP with tidy and custom-tags).</li>
+</ul></li>
+<li>XML:
+<ul>
+  <li>Fixed bug <?php githubissuel('php/php-src', 20439); ?> (xml_set_default_handler() does not properly handle special characters in attributes when passing data to callback).</li>
+</ul></li>
+<li>Zip:
+<ul>
+  <li>Fix crash in property existence test.</li>
+  <li>Don't truncate return value of zip_fread() with user sizes.</li>
+</ul></li>
+<li>Zlib:
+<ul>
+  <li>Fix assertion failures resulting in crashes with stream filter object parameters.</li>
+</ul></li>
+</ul>
+<!-- }}} --></section>
+
+
+
 <section class="version" id="8.4.15"><!-- {{{ 8.4.15 -->
 <h3>Version 8.4.15</h3>
 <b><?php release_date('20-Nov-2025'); ?></b>
diff --git a/archive/archive.xml b/archive/archive.xml
index f13c6bd56..7a8ccfd0e 100644
--- a/archive/archive.xml
+++ b/archive/archive.xml
@@ -9,6 +9,7 @@
     <uri>http://php.net/contact</uri>
     <email>php-webmaster@lists.php.net</email>
   </author>
+  <xi:include href="entries/2025-12-18-4.xml"/>
   <xi:include href="entries/2025-12-18-3.xml"/>
   <xi:include href="entries/2025-12-18-2.xml"/>
   <xi:include href="entries/2025-12-18-1.xml"/>
diff --git a/archive/entries/2025-12-18-4.xml b/archive/entries/2025-12-18-4.xml
new file mode 100644
index 000000000..e946df771
--- /dev/null
+++ b/archive/entries/2025-12-18-4.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<entry xmlns="http://www.w3.org/2005/Atom">
+  <title>PHP 8.4.16 Released!</title>
+  <id>https://www.php.net/archive/2025.php#2025-12-18-4</id>
+  <published>2025-12-18T23:19:06+00:00</published>
+  <updated>2025-12-18T23:19:06+00:00</updated>
+  <link href="https://www.php.net/index.php#2025-12-18-4" rel="alternate" type="text/html"/>
+  <link href="https://www.php.net/archive/2025.php#2025-12-18-4" rel="via" type="text/html"/>
+  <category term="releases" label="New PHP release"/>
+  <category term="frontpage" label="PHP.net frontpage news"/>
+  <content type="xhtml">
+    <div xmlns="http://www.w3.org/1999/xhtml"><p>The PHP development team announces the immediate availability of PHP 8.4.16. This is a security release.</p>
+
+<p>All PHP 8.4 users are encouraged to upgrade to this version.</p>
+
+<p>For source downloads of PHP 8.4.16 please visit our <a href="https://www.php.net/downloads.php">downloads page</a>,
+Windows source and binaries can also be found <a href="https://www.php.net/downloads.php?os=windows&amp;version=8.4">there</a>.
+The list of changes is recorded in the <a href="https://www.php.net/ChangeLog-8.php#8.4.16">ChangeLog</a>.
+</p>    </div>
+  </content>
+</entry>
diff --git a/include/release-qa.php b/include/release-qa.php
index f78106479..11b4c0c9c 100644
--- a/include/release-qa.php
+++ b/include/release-qa.php
@@ -88,12 +88,12 @@ $QA_RELEASES = [
         'active'  => true,
         'release' => [
             'type'       => 'RC',
-            'number'     => 1,
-            'sha256_bz2' => 'e6c3a8b14d3b83d1c7870a2785fa52b018a47e99fbca928133fb5db83b45d0f5',
-            'sha256_gz'  => 'f3c82948de16204e3432a5a26276c67f18b9ee18de3170faebeab6e84e44b33d',
-            'sha256_xz'  => '5a9e95594132d1950ccfe250b519382b0f9c9fdb1831d3b3caa338d5fa55b10c',
+            'number'     => 0,
+            'sha256_bz2' => '',
+            'sha256_gz'  => '',
+            'sha256_xz'  => '',
             'date'       => '04 Dec 2025',
-            'baseurl'    => 'https://downloads.php.net/~saki/',
+            'baseurl'    => 'https://downloads.php.net/',
         ],
     ],
 
diff --git a/include/releases.inc b/include/releases.inc
index 225c2bd3c..706db5ebe 100644
--- a/include/releases.inc
+++ b/include/releases.inc
@@ -2,6 +2,43 @@
 $OLDRELEASES = array (
   8 => 
   array (
+    '8.4.15' => 
+    array (
+      'announcement' => 
+      array (
+        'English' => '/releases/8_4_15.php',
+      ),
+      'tags' => 
+      array (
+        0 => '',
+      ),
+      'date' => '20 Nov 2025',
+      'source' => 
+      array (
+        0 => 
+        array (
+          'filename' => 'php-8.4.15.tar.gz',
+          'name' => 'PHP 8.4.15 (tar.gz)',
+          'sha256' => '51d23c98073c1e88c98c12b175736a11316cd3d4753f8d060934e53e5a9945c3',
+          'date' => '20 Nov 2025',
+        ),
+        1 => 
+        array (
+          'filename' => 'php-8.4.15.tar.bz2',
+          'name' => 'PHP 8.4.15 (tar.bz2)',
+          'sha256' => 'b7155bdd498d60d63e4bc320dc224863976d31b5bd9339699726c961255a3197',
+          'date' => '20 Nov 2025',
+        ),
+        2 => 
+        array (
+          'filename' => 'php-8.4.15.tar.xz',
+          'name' => 'PHP 8.4.15 (tar.xz)',
+          'sha256' => 'a060684f614b8344f9b34c334b6ba8db1177555997edb5b1aceab0a4b807da7e',
+          'date' => '20 Nov 2025',
+        ),
+      ),
+      'museum' => false,
+    ),
     '8.2.29' => 
     array (
       'announcement' => 
diff --git a/include/version.inc b/include/version.inc
index 8af309dad..856038964 100644
--- a/include/version.inc
+++ b/include/version.inc
@@ -34,13 +34,13 @@ $RELEASES = (function () {
 
     /* PHP 8.4 Release */
     $data['8.4'] = [
-        'version' => '8.4.15',
-        'date' => '20 Nov 2025',
-        'tags' => [''], // Set to ['security'] for security releases.
+        'version' => '8.4.16',
+        'date' => '18 Dec 2025',
+        'tags' => ['security'], // Set to ['security'] for security releases.
         'sha256' => [
-            'tar.gz' => '51d23c98073c1e88c98c12b175736a11316cd3d4753f8d060934e53e5a9945c3',
-            'tar.bz2' => 'b7155bdd498d60d63e4bc320dc224863976d31b5bd9339699726c961255a3197',
-            'tar.xz' => 'a060684f614b8344f9b34c334b6ba8db1177555997edb5b1aceab0a4b807da7e',
+            'tar.gz' => '8e35d24f148ea7c2a93e9b9bcc329e8bf78b5bb922f3723a727c74c19d184e98',
+            'tar.bz2' => '6c48c65eba6a2f7a102925d08772239b1f45110aed2187fdd81b933ed439c692',
+            'tar.xz' => 'f66f8f48db34e9e29f7bfd6901178e9cf4a1b163e6e497716dfcb8f88bcfae30',
         ]
     ];
 
diff --git a/releases/8_4_16.php b/releases/8_4_16.php
new file mode 100644
index 000000000..e02dd3590
--- /dev/null
+++ b/releases/8_4_16.php
@@ -0,0 +1,16 @@
+<?php
+$_SERVER['BASE_PAGE'] = 'releases/8_4_16.php';
+include_once __DIR__ . '/../include/prepend.inc';
+site_header('PHP 8.4.16 Release Announcement');
+?>
+<h1>PHP 8.4.16 Release Announcement</h1>
+
+<p>The PHP development team announces the immediate availability of PHP 8.4.16. This is a security release.</p>
+
+<p>All PHP 8.4 users are encouraged to upgrade to this version.</p>
+
+<p>For source downloads of PHP 8.4.16 please visit our <a href="https://www.php.net/downloads.php">downloads page</a>,
+Windows source and binaries can also be found <a href="https://www.php.net/downloads.php?os=windows&amp;version=8.4">there</a>.
+The list of changes is recorded in the <a href="https://www.php.net/ChangeLog-8.php#8.4.16">ChangeLog</a>.
+</p>
+<?php site_footer();