CVE-2026-24894

FrankenPHP leaks session data between requests in worker mode

State: Published
Severity: 8.7 High
Published: Feb 12, 2026
Updated: Feb 12, 2026
Reserved: Jan 27, 2026

Description

FrankenPHP is a modern application server for PHP. Prior to 1.11.2, when running FrankenPHP in worker mode, the $_SESSION superglobal is not correctly reset between requests. This allows a subsequent request processed by the same worker to access the $_SESSION data of the previous request (potentially belonging to a different user) before session_start() is called. This vulnerability is fixed in 1.11.2.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-269 Improper Privilege Management
CWE-384 Session Fixation
CWE-613 Insufficient Session Expiration

Affected Products

Product	Versions
frankenphpphp	< 1.11.2Affected

References

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