CVE-2026-128014

FrankenPHP 1.8.0 before 1.13.2 Out-of-Bounds Write via Bundled Brotli Decoder

FrankenPHP standalone static binaries 1.8.0 before 1.13.2 bundle the PHP brotli extension statically linked with Brotli 1.2.0, whose decoder contains an out-of-bounds write (CVE-2026-111497). Unauthenticated remote attackers can send crafted data to applications that pass it to brotli_uncompress_add() to crash the entire FrankenPHP process, and possibly cause memory disclosure or code execution.

CVSS 4.0 · 9.2 Critical EPSS n/a KEV · Not listed

Vendors

Php

Products

Frankenphp

CVE-2026-128015

FrankenPHP before 1.13.4 Use-After-Free via putenv() During Request Shutdown

FrankenPHP before 1.13.4 contains a use-after-free vulnerability that leaves a dangling pointer to a freed environment table when putenv() is called during request shutdown. Attackers triggering putenv() in shutdown functions, destructors, or session handlers can crash the process on the next getenv() call or leak previous request environment values.

CVSS 4.0 · 8.3 High EPSS n/a KEV · Not listed

Vendors

Php

Products

Frankenphp

CVE-2026-128016

FrankenPHP before 1.13.4 Use-After-Free of SplTempFileObject Streams in Worker Mode

FrankenPHP before 1.13.4 contains a use-after-free vulnerability in worker mode that frees internal streams of SplTempFileObject or SplFileObject on php://temp instances surviving across requests. Remote clients can send requests reaching code that uses such persisted objects, causing reads of freed memory that leak garbage data or crash the process.

CVSS 4.0 · 8.3 High EPSS n/a KEV · Not listed

Vendors

Php

Products

Frankenphp

CVE-2026-128017

FrankenPHP before 1.13.4 Double Free in Worker Mode via Non-Form POST

FrankenPHP before 1.13.4 contains a double free vulnerability in worker mode that frees SG(request_info).content_type_dup twice when a worker script ends its loop after a non-form POST request. Unauthenticated attackers can send repeated JSON POST requests until the worker loop ends, aborting the whole process when USE_ZEND_ALLOC=0 is set.

CVSS 4.0 · 6.3 Medium EPSS n/a KEV · Not listed

Vendors

Php

Products

Frankenphp

CVE-2026-128018

FrankenPHP before 1.13.4 Pending Worker Request Denial of Service

FrankenPHP before 1.13.4 contains a denial of service vulnerability in worker mode where frankenphp_handle_request() returns false without finishing the dequeued request after a fatal error during request startup. Attackers who trigger startup fatal errors against worker scripts that keep calling frankenphp_handle_request() can leave client requests hanging indefinitely while the worker continues running.

CVSS 4.0 · 6.3 Medium EPSS n/a KEV · Not listed

Vendors

Php

Products

Frankenphp

CVE-2026-128019

FrankenPHP before 1.13.4 Information Disclosure via Per-Request Environment Variable Leak

FrankenPHP before 1.13.4 contains an information disclosure vulnerability in worker mode that leaks per-request environment variables into later requests on the same PHP thread. Attackers can read values set via env directives with request placeholders or WithRequestEnv() through getenv() or $_SERVER, causing applications to act on another user's routing, tenant, or authorization values.

CVSS 4.0 · 6.3 Medium EPSS n/a KEV · Not listed

Vendors

Php

Products

Frankenphp

CVE-2026-128020

FrankenPHP before 1.13.2 Denial of Service via Cyclic Array Conversion

FrankenPHP before 1.13.2 contains an uncontrolled recursion vulnerability in its PHP-to-Go array converter that fails to detect circular references in PHP arrays. Passing a self-referential array to frankenphp_log() or returning one from a worker callback triggers a fatal Go stack overflow, terminating the entire server process.

CVSS 4.0 · 8.2 High EPSS n/a KEV · Not listed

Vendors

Php

Products

Frankenphp

CVE-2026-128021

FrankenPHP before 1.13.2 Information Disclosure via libxml Error State in Worker Mode

FrankenPHP before 1.13.2 contains an information disclosure vulnerability that allows later clients to read earlier clients' libxml errors because worker mode never resets LIBXML(error_list) between requests. Attackers sending requests to the same worker thread can call libxml_get_errors() or libxml_get_last_error() to obtain other clients' parsed-document fragments and server filesystem paths.

CVSS 4.0 · 6.3 Medium EPSS n/a KEV · Not listed

Vendors

Php

Products

Frankenphp

CVE-2026-128022

FrankenPHP before 1.13.2 Denial of Service via Queued Disconnected Requests

FrankenPHP before 1.13.2 contains a resource exhaustion vulnerability that allows unauthenticated clients to tie up PHP threads because queued requests are not cancelled when clients disconnect. Attackers can send many requests and close connections immediately, forcing handleRequestWithRegularPHPThreads and worker handlers to execute them and delay all clients sharing the thread pool.

CVSS 4.0 · 6.9 Medium EPSS n/a KEV · Not listed

Vendors

Php

Products

Frankenphp

CVE-2026-128023

FrankenPHP before 1.13.0 Authentication Bypass via Dot-Form Header Name Aliasing

FrankenPHP before 1.13.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to spoof trusted headers by sending dot-form header names that PHP rewrites to underscores. Attackers can send headers like X.Authenticated.User or X.Forwarded.For that map to $_SERVER keys, spoofing user identity, client IP, or scheme.

CVSS 4.0 · 9.1 Critical EPSS n/a KEV · Not listed

Vendors

Php

Products

Frankenphp

CVE-2026-128024

FrankenPHP before 1.13.0 Denial of Service via goArray Nil Type Assertion

FrankenPHP before 1.13.0 contains a denial of service vulnerability in goArray() that allows remote attackers to abort the server process via arrays with null integer-keyed elements. Attackers can send crafted JSON passed to frankenphp_log() or returned from worker callbacks, triggering an unrecovered cgo panic that terminates every vhost and in-flight request.

CVSS 4.0 · 8.2 High EPSS n/a KEV · Not listed

Vendors

Php

Products

Frankenphp

CVE-2026-128025

FrankenPHP before 1.13.0 CGI Path-Split Boundary Bypass via splitPos

FrankenPHP before 1.13.0 contains a path-split interpretation conflict in splitPos in cgi.go that allows unauthenticated attackers to execute protected PHP scripts by embedding .php inside a filename component. Attackers can request paths like /uploads/a.php.txt/b.php to execute uploads/a.php despite route-level or WAF deny rules and forge PATH_INFO, SCRIPT_NAME, and PHP_SELF values.

CVSS 4.0 · 6.9 Medium EPSS n/a KEV · Not listed

Vendors

Php

Products

Frankenphp

CVE-2026-128026

FrankenPHP 1.5.0 before 1.13.0 Cross-Request Environment Leakage via putenv

FrankenPHP from 1.5.0 before 1.13.0 contains an incomplete environment sandbox vulnerability in which putenv writes to the process-wide OS environment via os.Setenv, leaking values across concurrent requests. Attackers reaching a request path that spawns child processes with the default environment through proc_open or exec can read secrets such as database passwords set by other requests.

CVSS 4.0 · 6.9 Medium EPSS n/a KEV · Not listed

Vendors

Php

Products

Frankenphp

CVE-2026-128027

FrankenPHP before 1.1.11 Delayed Propagation of Base Image Security Fixes

FrankenPHP Docker images before 1.1.11 were rebuilt only when new base image tags were created, so security fixes that Alpine, PHP, and Go applied under existing tags were not propagated. Remote attackers could exploit known flaws in the stale system libraries, such as CVE-2025-15467 in libcrypto3, to execute code.

CVSS 4.0 · 9.3 Critical EPSS n/a KEV · Not listed

Vendors

Php

Products

Frankenphp

CVE-2026-122233

FrankenPHP before 1.13.4 Cross-Request Response Header Leak in Worker Mode

FrankenPHP before 1.13.4 contains an information disclosure vulnerability in worker mode that fails to clear last HTTP stream response headers between requests, because the reset only happens in RSHUTDOWN, which worker requests skip. Later requests calling http_get_last_response_headers() can read headers fetched by earlier requests on the same worker thread, exposing other users' Set-Cookie or token headers from backend APIs.

CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed

Vendors

Php

Products

Frankenphp

CVE-2026-109619

RCE via stale global state

PHP has various global state that temporarily points into request memory. In some scenarios, global state may not be correctly reset, or may be repopulated after being reset. The global state may then refer to request memory even after it has been freed. Subsequent requests may read or branch on this stale state before it is fully initialized. Multiple strategies can trigger this condition and produce remote code execution (RCE).

CVSS 4.0 · 9.2 Critical EPSS 100.0% KEV · Listed

Vendors

Paloaltonetworks Php Redhat and 1 more

Products

Pan-os Panorama M-200 Panorama M-300 and 21 more

CVE-2026-109618

RCE via OOM corruption

PHP uses longjmp() for out-of-memory (OOM) errors to exit the current context and abort handling of the request. Some contexts may not properly account for this scenario and leave request memory in an uninitialized state before performing an allocation. The subsequent request cleanup procedure may read or branch on this memory. Multiple OOM strategies can consistently trigger this condition and lead to remote code execution (RCE).

CVSS 4.0 · 9.2 Critical EPSS 100.0% KEV · Listed

Vendors

Paloaltonetworks Php Redhat and 1 more

Products

Pan-os Panorama M-200 Panorama M-300 and 20 more

CVE-2026-91768

IPv6 ACL bypass in FastCGI listen.allowed_clients due to partial address comparison (memcmp 12 bytes)

The IPv6 branch of the FastCGI client access check compares only the first 12 bytes of a 16-byte IPv6 address, so listen.allowed_clients matches on a /96 prefix instead of the exact address. An attacker who can source an address sharing the first 96 bits with an allowed one passes the check and reaches the FastCGI endpoint.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Php Php Group

Products

Php Php

CVE-2026-92842

OOB read / info leak in convert.* stream filters when line-break-chars contains NUL

The convert.base64-encode, convert.quoted-printable-encode and convert.quoted-printable-decode stream filters accept a line-break-chars option whose length is tracked separately from the string itself. The filter constructors duplicate the value with pestrdup(), which stops at the first NUL byte, while keeping the original length. When the filter later emits a line break it copies the recorded length out of the truncated allocation, reading past its end and placing adjacent heap bytes into the filter output.

CVSS 3.1 · 5.9 Medium EPSS < 1% KEV · Not listed

Vendors

Php Php Group

Products

Php Php

CVE-2026-91767

Heap-buffer-overflow in php_openssl_matches_wildcard_name on crafted server cert wildcard CN

php_openssl_matches_wildcard_name() in ext/openssl/xp_ssl.c underflows the length argument passed to memchr() when a TLS server certificate presents a wildcard name whose literal characters are together longer than the hostname being verified. A malicious server presenting such a certificate makes the PHP client read up to SIZE_MAX bytes past the end of a heap allocation. The path is reachable from any default client stream, because verify_peer_name is enabled by default.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Php Php Group

Products

Php Php