CVE-2026-128016

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

Published Nov 13, 2026 CVSS 4.0 · 8.3 High EPSS n/a KEV · Not listed

Description

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.

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
`0`	affected	< 1.13.4
`1.13.4`	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 Low

Vulnerable System Integrity Impact None

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 Low

Integrity Impact None

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/commit/837b76880b33a1a78ae4f27dea85bdcddb6cf70c
https://github.com/php/frankenphp/security/advisories/GHSA-cm3q-jw2q-9rh5
https://www.vulncheck.com/advisories/frankenphp-before-1.13.4-use-after-free-of-spltempfileobject-streams-in-worker-mode

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 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.
Title		FrankenPHP before 1.13.4 Use-After-Free of SplTempFileObject Streams in Worker Mode
First Time appeared		Php Php frankenphp
Weaknesses		CWE-416
CPEs		cpe:2.3:a:php:frankenphp::::::::
Vendors & Products		Php Php frankenphp
References		https://github.com/php/frankenphp/commit/837b76880b33a1a78ae4f27dea85bdcddb6cf70c https://github.com/php/frankenphp/security/advisories/GHSA-cm3q-jw2q-9rh5 https://www.vulncheck.com/advisories/frankenphp-before-1.13.4-use-after-free-of-spltempfileobject-streams-in-worker-mode
Metrics		cvssV3_1 `{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H'}` cvssV4_0 `{'score': 8.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N'}`