PHP version 8.5.11 (24 Sep 2026)

BCMath:

• Fixed out-of-bounds read in bc_is_zero_for_scale() when scale exceeds n_scale. (Ilia Alshanetsky)

Core:

• Fixed out-of-bounds reads during automatic UTF-16/32 encoding detection. (Yudai Takada)
• Fixed bug GH-15375 (Nested "yield from" skips items after a valid() or next() call on the inner generator). (iliaal)
• Fixed bug GH-23232 (lone namespace separator asks the autoloader for an empty class name). (spawnia)
• Fixed bug GH-23301 (Nested "yield from" yields a value twice when the middle generator delegates again). (Lazizbek Ergashev)

DOM:

• Fixed NamedNodeMap::getNamedItemNS() with an empty URI not matching the null namespace in spec-following mode. (Ilia Alshanetsky)
• Fixed stale getElementsByClassName() and other node list caches after className/classList writes and attribute removals. (Ilia Alshanetsky)
• Fixed a use-after-free when cloning a DOMNameSpaceNode after DOMDocument::xinclude(). (iliaal)
• Fixed a crash in DOMXPath when a php:function callback receives a nodeset and a later callback returns a node from another document. (iliaal)
• Fixed bug GH-23331 (UAF when node_list_unlink() skips attribute children that still have a live wrapper). (iliaal)
• Fixed a use-after-free when Dom\Element::setAttributeNS() replaces the value of an attribute whose child still has a live wrapper. (iliaal)

GD:

• Fixed imageaffinematrixget() and imageaffinematrixconcat() reporting the wrong argument in error messages. (Weilin Du)

FPM:

• Fixed bug GH-19320 (FPM UID and GID overflow). (Pratik Bhujel)
• Fixed GHSA-62xp-839h-2637 (IPv6 ACL bypass in FastCGI listen.allowed_clients due to partial address comparison). (CVE-2026-91768) (Alexandre Daubois)

Intl:

• Fixed grapheme_strpos() and grapheme_strrpos() with an empty needle returning UTF-16 offsets instead of grapheme offsets. (Ilia Alshanetsky)
• Fixed a memory leak when dumping IntlCalendar instances. (Ilia Alshanetsky)
• Fixed a memory leak when iterating IntlBreakIterator::getPartsIterator() results. (iliaal)
• Fixed a double-free when IntlGregorianCalendar construction fails after the ICU constructor adopts the TimeZone. (iliaal)
• Fixed bug GH-23094 (NumberFormatter parsing offsets use UTF-16 positions for UTF-8 strings). (ColumbusLabs)
• Fixed Locale::parseLocale() reading past a trailing '-' or '_'. (iliaal, Xuyang Zhang)
• Fixed grapheme_str_split() treating UBRK_DONE as a byte index. (iliaal)
• Fixed a leak in Locale::getKeywords() when a keyword value cannot be read. (iliaal)
• Fixed a use-after-free when IntlRuleBasedBreakIterator is constructed from compiled rules. (iliaal)

MBString:

• Fixed mb_ereg_replace() emitting a NUL or out-of-bounds bytes in the replacement when a \k<name> backref has no closing delimiter. (Ilia Alshanetsky)

MySQLnd:

• Fixed GHSA-r6x9-5r99-36j7 (Various packet overreads in mysqlnd wire protocol). (CVE-2025-1218) (Jakub Zelenka, Nora Dossche)

ODBC:

• Fixed odbc_field_len(), odbc_field_scale() and odbc_field_type() returning uninitialized memory when SQLColAttribute fails. (Ilia Alshanetsky)

Opcache:

• Fixed opcache.protect_memory race under ZTS. (realFlowControl)
• Fixed a tracing JIT crash when compiling a side trace for a method of a class that could not be stored in the inheritance cache. (GH-21710) (Arnaud, iliaal)
• Fixed a crash when the huge page SHM remap discarded mappings outside the reserved address range. (Piotr Hałas)

OpenSSL:

• Fixed GHSA-vvx9-73fr-5jjx (TLS hostname verification falls back to CN after SAN mismatch). (CVE-2026-91769) (Jakub Zelenka)
• Fixed GHSA-xr7j-rvgx-xq5p (Heap buffer overflow in php_openssl_matches_wildcard_name() on crafted server certificate wildcard CN). (CVE-2026-91767) (Jakub Zelenka)

PDO:

• Fixed a leak when a persistent connection failed a liveness check with no other live PDO handle. (iliaal)

PDO_PGSQL:

• Fixed PDO::CURSOR_SCROLL statements failing under lazy fetching (PDO::ATTR_PREFETCH => 0). (KentarouTakeda)

PDO Sqlite:

• Fixed bug GH-20214 (PDO::FETCH_DEFAULT unexpected behavior with PDOStatement::setFetchMode). (SakiTakamachi)

Phar:

• Fixed bug GH-23418 (Use-after-free when looking up mounted directories). (Weilin Du)
• Fixed bug GH-23477 (Memory leak on duplicate native Phar manifest entries). (Weilin Du)
• Fixed GHSA-j3wh-g957-2m85 (Integer overflow in phar_tar_number() allowing TAR archive entry injection). (CVE-2026-6103) (Jakub Zelenka)

Readline:

• Fixed the interactive shell not waiting for the pager process to exit. (Weilin Du)

SOAP:

• Fixed WSDL cache corruption when a soap:header defines headerfaults. (Ilia Alshanetsky)
• Fixed stack overflow when parsing a WSDL with self-referential schema groups or attributeGroups. (Ilia Alshanetsky)
• Fixed GHSA-rgrp-mwpx-f6rm (Unbounded recursion in server-side cleanup_xml_node()). (CVE-2026-91765) (Alexandre Daubois)
• Fixed GHSA-cj93-vc83-wgqv (Integer overflow to buffer overflow in SOAP HTTP parsing). (CVE-2025-14181) (Nora Dossche, Jakub Zelenka)

Standard:

• Fixed a segfault when a stream filter callback unsets StreamBucket::$data before re-attaching the bucket. (iliaal)
• Fixed GHSA-7875-c8px-7q5f (Out-of-bounds read in the HTTP stream wrapper when following a redirect with an empty Location header). (CVE-2026-93682) (Ilia Alshanetsky, Jordi Kroon)
• Fixed read buffer compaction in php_stream_filter_flush(). (crystarm)
• Fixed bug GH-22410 (Incorrect float behavior with large numbers). (arshidkv12)
• Fixed GH-23338 (fsockopen()/pfsockopen() ValueError reported wrong argument number for $timeout). (lacatoire)
• Fixed bug GH-23576 (Next index for array returned from array_keys() is wrong). (Lazizbek Ergashev)
• Fixed GHSA-88hq-2827-7pg6 (Out-of-bounds read in convert. stream filters when line-break-chars contains NUL). (CVE-2026-92842*) (geeknik)
• Fixed GHSA-fpwc-w8rq-cr92 (Cross-origin credential leak in HTTP stream wrapper redirects). (CVE-2026-91766) (Alexandre Daubois)

SimpleXML:

• Fixed writing to a dimension of the object returned by attributes() not creating the attribute. (Ilia Alshanetsky)
• Fixed child elements of the element returned by SimpleXMLElement::addChild() not being accessible by property name when namespaces are involved. (Ilia Alshanetsky)

SAPI:

• Fixed fuzzer targets failing to build in isolation. (Mrmaxmeier)
• Fixed returns uninitialized value on LiteSpeed lsapi SAPI (Go Kudo)