Core

• Fixed GHSA-w8hw-w9fx-j79w, GHSA-6wmf-4rv5-p3rp (Avoid state corruption via bailout). (CVE-2026-109618, CVE-2026-109619)
• Fix GH-21999: GC inconsistency with lazy object, var_dump(), and object comparison.
• Fixed OSS-Fuzz #536440507 (Immutable class incorrect assertion).
• Fixed AVX being reported as supported when the OS has not enabled AVX state.
• Fixed GH-23980 (ZEND_ASSERT violation @ ZEND_INCLUDE_OR_EVAL).
• Fixed bug GH-23896 (Assertion failure in zend_call_function() after a throwing deprecation).
• Fixed use-after-free when a dl()-loaded extension declares a frameless function and a later request calls it.
• Fixed System V shared memory emulation for Windows attaching segments past the end of their mapping.
• Fixed bug GH-24050 (GC frees an object still held by a resurrected closure when (object) and use share an array).
• Fixed use-after-free when a Fiber callable resolves to $this of the method creating the Fiber ([A::class, 'm'] or "A::m") and that object dies before the Fiber runs.
• Fixed exception thrown by destructor during GC in a Fiber not being rethrown into the frame that triggered the GC.
• Fixed bug GH-24139 (NULL pointer dereference in php_ini.c when expand_filepath() fails).

BCMath

• Fixed BcMath\Number results that truncate to zero keeping a negative sign and comparing less than zero.

BZ2

• Fixed double close of the descriptor and use-after-free of the inner stream when bzopen() is given a stream resource.

CLI

• Fix GH-22567 (Windows ZTS CLI SAPI should refresh its TSRMLS cache during request activation).
• Fixed bug GH-23764 (Built-in server leaks a file descriptor on every HEAD request for a static file).
• Fixed crash in the built-in server when a client is reset before being accepted.
• Fixed the built-in server truncating an error page and leaking its unsent part after a partial socket write.

DOM

• Fixed use-after-free when re-constructing a DOMXPath whose php:function registrations are freed while still reachable from the cycle collector.
• Fixed bug GH-23365 (DOMNode::insertBefore($n, $n) drops the node and leaves a self-referencing sibling list).
• Fixed Dom\HTMLDocument::getElementById() not finding ids of SVG and MathML elements.
• Fixed Dom\HTMLDocument giving attributes the namespace of their element when a fragment is parsed with an xlink, xml or xmlns context element.
• Fixed bug GH-23729 (DOMXPath::__construct() use-after-free during an evaluation).
• Fixed bug GH-23897 (php:function() assertion failure after a failed registerPHPFunctions()).
• Fixed DOMXPath and Dom\XPath losing the context node and in-scope namespaces of an evaluation after a php:function() callback evaluated another expression on the same object.

FFI

• Fixed crashes with FFI callbacks created from __call() trampolines and array callables whose object is released.

FTP

• Fixed bug GH-23619 (cryptic error on servers that don't support TLS session resumption on data connection).

GD

• Fixed undefined behavior with GD2 images with INT_MAX-sized chunks.
• Fixed undefined behavior with GIFs with problematic LZW compression data.

Intl

• Fixed IntlDateFormatter::parse(), localtime() and parseToCalendar() treating the offset as UTF-16 code units instead of bytes.
• Fixed cloning IntlDateFormatter and MessageFormatter losing PHP-side state such as dateType, timeType, calendar and the message pattern.
• Fixed Collator attribute and strength methods not rejecting an unconstructed Collator.
• Fixed grapheme_strstr() and grapheme_stristr() returning incorrect substrings when supplementary characters precede the match.
• Fixed grapheme_strstr() and grapheme_strpos() missing canonically equivalent matches, and grapheme searches reporting ICU errors for empty haystacks.
• Fixed grapheme_strrpos() and grapheme_strripos() skipping overlapping matches when using a negative offset.
• Fixed grapheme_extract() returning an incorrect next offset when starting inside a multibyte UTF-8 character.

Lexbor

• Merge patches lexbor/lexbor@8a14bc0 and lexbor/lexbor@f67ce4b, fixing a heap buffer overflow in :lexbor-contains() parsing and buffer overflows in malformed decode replay.

MBString

• Fixed bug GH-23106 (mb_strpos() reads past the end of a haystack ending in a truncated UTF-8 sequence).
• Fixed mbstring functions emitting surrogates in UTF-8 output and flagging it as valid UTF-8.

MySQLi

• Fix GH-22854: Fixed failed assertion when accessing mysqli property after failed reconnection.

MySQLnd

• Fixed field_count not resetting on OK packet.
• Fixed memory leak when closing a prepared statement after its connection was killed.

Opcache

• Fixed OSS-Fuzz #546798343 (Heap-buffer-overflow in optimizer with FCCs and inlining).
• Fixed bug GH-23693 (Tracing JIT produces wrong results for a guard on a loop-invariant addition).
• Fixed OSS-Fuzz #5674034779193344 (Read of uninitialized memory in is_cacheable_stream_path()).
• Fix zend_analyze_calls() call_stack buffer overrun.
• Fixed bug GH-23637 (PHP-FPM worker SIGSEGV: run_time_cache map_ptr offset beyond CG(map_ptr_last) when a class is reached through the CE cache).
• Fix multiple incorrect DCE due to unsound escape analysis.
• Fixed bug GH-24063 (OPcache optimizer folds $cond ? -0.0 : 0.0 into a single -0.0 constant).
• Fixed crash when a file cache is reused with a different set of extensions declaring frameless functions.
• Fixed bug GH-23991 (JIT generates invalid IR for multiple recursive calls).
• Fix SCCP evaluation of isset()/empty() on dimension of non-escaping object.

OpenSSL

• Fixed stream_socket_enable_crypto() leaving the socket non-blocking after a handshake timeout.
• Fixed feof() on a TLS stream staying false after a close_notify on Windows.

PCNTL

• Fixed pcntl_signal_dispatch() dropping the queued signals when it runs while an exception is pending.
• Fixed pcntl_signal_dispatch() dropping the signals queued behind a handler that throws.
• Fixed pcntl_setcpuaffinity() error message advertising the cpu count as the inclusive upper bound.
• Fixed pcntl_setqos_class() requiring its optional $qos_class argument.
• Fixed bug GH-23986 (/proc/self paths resolve to the parent process after pcntl_fork()).

PDO

• Fixed PDOStatement::getColumnMeta() reading out of bounds for an invalid column index.
• Fixed PDOStatement::bindColumn() registering a binding for a column name that is not in the result set.
• Fixed PDOStatement::execute() leaving the previous result available after a failed execution.
• Fixed a use-after-free when bindValue()/execute()/closeCursor() is called from a bound parameter's __toString() during execute().
• Fixed bug GH-23962 (Destroying a persistent PDO instance rolls back a transaction still in use by another instance).
• Fixed PDO::setAttribute() installing a PDO::ATTR_STATEMENT_CLASS class whose constructor arguments it rejects.
• Fixed PDO::ATTR_STATEMENT_CLASS constructor_args type errors reporting "array given" regardless of the value passed.
• Fixed PDOStatement::bindParam() and bindColumn() leaking the driver options value.
• Fixed PDOStatement not reporting its bound parameters and columns to the cycle collector.
• Fixed PDOStatement::setFetchMode() not applying changes atomically.

PDO_DBLIB

• Fixed bug GH-23741 (segfault after a failed query inside a PDO transaction). Errors raised by beginTransaction(), commit(), rollBack() and lastInsertId() are now reported instead of being dropped.

PDO_Firebird

• Fixed bug GH-23758 (PDO_Firebird returns null for non-null empty BLOBs).

Readline

• Fixed a heap over-read in the interactive shell prompt when cli.prompt is set to an empty string.

Session

• Fixed session_start() continuing after a failed create_sid() when session.use_strict_mode rejects the supplied ID.
• Fixed exceptions from user-defined create_sid() handlers being replaced by return-value validation errors.

SimpleXML

• Fixed reconstructing a SimpleXMLElement freeing a child element that another variable still references.

SOAP

• Fixed bug GH-22895 (Heap use-after-free while encoding a Traversable with an illegal key).
• Fixed memory leak when load_wsdl_ex() failed to load.

Sockets

• Fixed socket_select() silently truncating sets larger than FD_SETSIZE on Windows.

SPL

• Fixed SplFixedArray::setSize() doing nothing on subclasses whose constructor does not call parent::__construct().
• Fixed memory leak when __construct(), __wakeup() or __unserialize() is called from an element destructor during setSize(0).

SQLite

• Fixed a crash when SQLite3::close() is called from a userland callback.

Standard

• Fixed sha1_file() returning a digest for incomplete data after a stream read failure.
• Fixed iptcembed() corrupting JPEG headers when called recursively from an output handler.
• Fixed proc_open() leaking descriptor zero when descriptor setup fails.
• Fixed three Windows-only proc_open() defects: an uninitialized PROCESS_INFORMATION, an indeterminate comspec pointer after a failed lookup, and an unchecked CreateFileA() failure.
• Fix persistent stream context lifetime during shutdown
• Fix wordwrap() ignoring an existing break at the end of the string
• Fixed convert.quoted-printable-decode decoding lowercase hex digits to the wrong byte.
• Fixed unserialize() of enums sharing its state with the unserialize() calls made by autoloaders.

Tidy

• Fixed a use-after-free when a tidyNode is used after its document is reparsed.

XSL

• Fixed bug GH-23730 (use-after-free when XSLTProcessor::importStylesheet() is called during a transformation).

Zip

• Fixed ZipArchive::extractTo() ignoring files given in a non-list array.
• Fixed bug GH-23747 (ZipArchive::close() use-after-free from a progress or cancel callback).