PHP 8.4.2 → 8.4.21

Vulnerabilities fixed by this upgrade

• 8.2 CVE-2026-12184 Failure to setup TLS with a remote server can result in a remote DoS
• 6.3 CVE-2026-7262 NULL pointer dereference in SOAP apache:Map decoder with missing <value>
• 6.3 CVE-2026-7261 SoapServer session-persisted object use-after-free via SOAP header fault
• low CVE-2026-7259 Null pointer dereference in php_mb_check_encoding() via mb_ereg_search_init()
• 7.6 CVE-2026-6735 XSS within PHP-FPM status endpoint
• 9.4 CVE-2026-6722 Use-After-Free in SOAP using Apache map with Remote Code Execution
• 6.3 CVE-2026-7258 Out-of-bounds read in urldecode()
• 6.3 CVE-2026-6104 Global buffer over-read in mb_convert_encoding() with attacker-supplied encoding
• 9.2 CVE-2025-14179 SQL injection in pdo_firebird via NUL bytes in quoted strings
• low CVE-2026-7568 Signed integer overflow in metaphone()
• 8.2 CVE-2026-7263 DoS attack via DOMNode::C14N()
• low GHSA-www2-q4fc-65wf Null byte termination in dns_get_record()
• 6.3 CVE-2025-14180 NULL Pointer Dereference in PDO quoting
• 6.5 CVE-2025-14178 Heap buffer overflow in array_merge()
• 6.3 CVE-2025-14177 Information Leak of Memory in getimagesize
• medium CVE-2025-1735 pgsql extension does not check for errors during escaping
• 5.9 CVE-2025-6491 NULL Pointer Dereference in PHP SOAP Extension via Large XML Namespace Prefix
• low CVE-2025-1220 Null byte termination in hostnames
• medium CVE-2024-11235 Reference counting in php_request_shutdown causes Use-After-Free
• low GHSA-wg4p-4hqh-c3g9 Possible out of bounds read when XML_OPTION_SKIP_TAGSTART used
• medium CVE-2025-1219 libxml streams use wrong `content-type` header when requesting a redirected resource
• medium CVE-2025-1736 Stream HTTP wrapper header check might omit basic auth header
• medium CVE-2025-1861 Stream HTTP wrapper truncate redirect location to 1024 bytes
• medium CVE-2025-1734 Streams HTTP wrapper does not fail for headers with invalid name and no colon
• medium CVE-2025-1217 Header parser of `http` stream wrapper does not handle folded headers

Breaking changes

None in the release notes.

Security changes

• security Fixes CVE-2026-6722: Use-After-Free in SOAP using Apache map with Remote Code Execution in 8.4.21
• security Fixes CVE-2025-14179: SQL injection in pdo_firebird via NUL bytes in quoted strings in 8.4.21
• security Fixes CVE-2026-12184: Failure to setup TLS with a remote server can result in a remote DoS in 8.4.21
• security Fixes CVE-2026-7263: DoS attack via DOMNode::C14N() in 8.4.21
• security Fixes CVE-2026-6735: XSS within PHP-FPM status endpoint in 8.4.21
• security Fixes CVE-2026-7262: NULL pointer dereference in SOAP apache:Map decoder with missing <value> in 8.4.21
• security Fixes CVE-2026-7261: SoapServer session-persisted object use-after-free via SOAP header fault in 8.4.21
• security Fixes CVE-2026-7258: Out-of-bounds read in urldecode() in 8.4.21
• security Fixes CVE-2026-6104: Global buffer over-read in mb_convert_encoding() with attacker-supplied encoding in 8.4.21
• security Fixes CVE-2026-7259: Null pointer dereference in php_mb_check_encoding() via mb_ereg_search_init() in 8.4.21
• security Fixes CVE-2026-7568: Signed integer overflow in metaphone() in 8.4.21
• security Fixes CVE-2025-14178: Heap buffer overflow in array_merge() in 8.4.16
• security Fixes CVE-2025-14180: NULL Pointer Dereference in PDO quoting in 8.4.16
• security Fixes CVE-2025-14177: Information Leak of Memory in getimagesize in 8.4.16
• security Fixes GHSA-www2-q4fc-65wf: Null byte termination in dns_get_record() in 8.4.16
• security Fixes CVE-2025-6491: NULL Pointer Dereference in PHP SOAP Extension via Large XML Namespace Prefix in 8.4.10
• security Fixes CVE-2025-1735: pgsql extension does not check for errors during escaping in 8.4.10
• security Fixes CVE-2025-1220: Null byte termination in hostnames in 8.4.10
• security Fixes CVE-2024-11235: Reference counting in php_request_shutdown causes Use-After-Free in 8.4.5
• security Fixes GHSA-wg4p-4hqh-c3g9: Possible out of bounds read when XML_OPTION_SKIP_TAGSTART used in 8.4.5
• security Fixes CVE-2025-1219: libxml streams use wrong `content-type` header when requesting a redirected resource in 8.4.5
• security Fixes CVE-2025-1736: Stream HTTP wrapper header check might omit basic auth header in 8.4.5
• security Fixes CVE-2025-1861: Stream HTTP wrapper truncate redirect location to 1024 bytes in 8.4.5
• security Fixes CVE-2025-1734: Streams HTTP wrapper does not fail for headers with invalid name and no colon in 8.4.5
• security Fixes CVE-2025-1217: Header parser of `http` stream wrapper does not handle folded headers in 8.4.5

Every release in between