Privilege escalation in PHP Frankenphp
CVE-2026-24894
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.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (28.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- PHP Frankenphp — versions < 1.11.2
Weakness classification (CWE)
References
- github.com/php/frankenphp/security/advisories/GHSA-r3xh-3r3w-47gp (Exploit, Vendor Advisory)
- github.com/php/frankenphp/commit/24d6c991a7761b638190eb081deae258143e9735 (Patch)
- github.com/php/frankenphp/releases/tag/v1.11.2 (Release Notes)
Frequently asked questions
- What is CVE-2026-24894?
- CVE-2026-24894 is a high-severity vulnerability in PHP Frankenphp, classified under Improper Privilege Management. CVSS score: 7.5/10. Published 2026-02-12.
- How severe is CVE-2026-24894?
- High severity. CVSS v3 base score is 7.5 out of 10.