CVE-2026-128014

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

Published Nov 13, 2026 CVSS 4.0 · 9.2 Critical EPSS n/a KEV · Not listed

Description

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

php

frankenphp

unaffected

Version	Status	Constraints
`1.8.0`	affected	< 1.13.2
`1.13.2`	unaffected	—

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity High

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/php/frankenphp/security/advisories/GHSA-p746-jj3f-94p8
https://www.vulncheck.com/advisories/frankenphp-1.8.0-before-1.13.2-out-of-bounds-write-via-bundled-brotli-decoder

History

Nov 13, 2026 9:45 AM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		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.
Title		FrankenPHP 1.8.0 before 1.13.2 Out-of-Bounds Write via Bundled Brotli Decoder
First Time appeared		Php Php frankenphp
Weaknesses		CWE-787
CPEs		cpe:2.3:a:php:frankenphp::::::::
Vendors & Products		Php Php frankenphp
References		https://github.com/php/frankenphp/security/advisories/GHSA-p746-jj3f-94p8 https://www.vulncheck.com/advisories/frankenphp-1.8.0-before-1.13.2-out-of-bounds-write-via-bundled-brotli-decoder
Metrics		cvssV3_1 `{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}` cvssV4_0 `{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}`