CVE-2026-24894CWE-269CWE-384CWE-613

FrankenPHP leaks session data between requests in worker mode

High · published February 12, 2026

CVSS v4.0
8.7
EPSS
0%
Percentile
34.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
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
EPSS
0.00414 · 34.6th percentile
Weaknesses
CWE-269 · Improper Privilege Management; CWE-384 · Session Fixation; CWE-613 · Insufficient Session Expiration
Published
2026-02-12T19:12Z
EPSS history
Timeline
  • 12 FEB 19:12Z
    FrankenPHP leaks session data between requests in worker mode
    cvelistv5