PHP 8.4.26: Downloads, Changelog, News

BCMath

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

Core

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

CLI

• Fixed bug GH-23425 (sapi_cli_server_send_headers() does not check the return value of php_cli_server_client_send_through()).

DOM

• Fixed NamedNodeMap::getNamedItemNS() with an empty URI not matching the null namespace in spec-following mode.
• Fixed a use-after-free when cloning a DOMNameSpaceNode after DOMDocument::xinclude().
• Fixed bug GH-23331 (UAF when node_list_unlink() skips attribute children that still have a live wrapper).
• Fixed a use-after-free when Dom\Element::setAttributeNS() replaces the value of an attribute whose child still has a live wrapper.

GD

• Fixed imageaffinematrixget() and imageaffinematrixconcat() reporting the wrong argument in error messages.
• Fixed bug GH-23457 (imagebmp() is extremely slow when writing to a file).

FPM

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

Hash

• Fixed a buffer overflow in hash_pbkdf2() with a large output length.

Intl

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

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.

MySQLnd

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

ODBC

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

Opcache

• Fixed a crash when the huge page SHM remap discarded mappings outside the reserved address range.
• Fixed opcache.protect_memory race under ZTS.
• Fixed bug GH-23288 (Crash on restart when opcache.interned_strings_buffer is overridden in an individual FPM pool).
• 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)

OpenSSL

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

PDO

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

PDO_ODBC

• Fixed bug GH-23444 (ODBC_ATTR_ASSUME_UTF8 corrupts Unicode data outside Windows).

PDO_PGSQL

• Fixed PDO::CURSOR_SCROLL statements closing a cursor that does not exist.

PDO Sqlite

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

Phar

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

SNMP

• Fixed bug GH-23453 (SNMP::setSecurity() frees a non-malloced address with a context engine ID longer than 32 bytes).

SOAP

• Fixed bug GH-23447 (Segfault when a class passed to SoapServer::setClass() fails to initialize).
• Fixed WSDL cache corruption when a soap:header defines headerfaults.
• Fixed stack overflow when parsing a WSDL with self-referential schema groups or attributeGroups.
• Fixed GHSA-rgrp-mwpx-f6rm (Unbounded recursion in server-side cleanup_xml_node()). (CVE-2026-91765)
• Fixed GHSA-cj93-vc83-wgqv (Integer overflow to buffer overflow in SOAP HTTP parsing). (CVE-2025-14181)

Standard

• Fixed a segfault when a stream filter callback unsets StreamBucket::$data before re-attaching the bucket.
• 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)
• Fixed a memory leak in array_merge_recursive() when the recursive merge of an object converted to an array fails.
• Fixed read buffer compaction in php_stream_filter_flush().
• Fixed bug GH-22410 (Incorrect float behavior with large numbers).
• Fixed GH-23338 (fsockopen()/pfsockopen() ValueError reported wrong argument number for $timeout).
• Fixed bug GH-23576 (Next index for array returned from array_keys() is wrong).
• Fixed GHSA-88hq-2827-7pg6 (Out-of-bounds read in convert.* stream filters when line-break-chars contains NUL). (CVE-2026-92842)
• Fixed GHSA-fpwc-w8rq-cr92 (Cross-origin credential leak in HTTP stream wrapper redirects). (CVE-2026-91766)

SimpleXML

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

Windows

• Fixed GHSA-9f67-6fw4-hpfp (Reserved device names are not rejected before file and stream I/O). (CVE-2026-17545)

Zip

• Fixed bug GH-23276 (ZipArchive subclass storing its own stream cannot be garbage collected).
• Fixed ZipArchive::extractTo() and ZipArchive::getFrom*() reporting success on corrupted entries.
• Fixed ZipArchive::getNameIndex() truncating the entry index to int.
• Fixed fstat() on a zip:// stream reporting success when the archive cannot be opened.

SAPI

• Fixed fuzzer targets failing to build in isolation.
• Fixed returns uninitialized value on LiteSpeed lsapi SAPI