What’s Vulnerable › Vulnerabilities

CVE-2026-24894: FrankenPHP leaks session data between requests in worker mode

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-12 · updated 2026-06-17
• Weakness: CWE-269

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.

Affected products

• php frankenphp: before 1.11.2 — fixed in 1.11.2

How to fix

Upgrade to a fixed version: php frankenphp 1.11.2. Check the vendor advisory for mitigations.

References

• https://github.com/php/frankenphp/commit/24d6c991a7761b638190eb081deae258143e9735
• https://github.com/php/frankenphp/releases/tag/v1.11.2
• https://github.com/php/frankenphp/security/advisories/GHSA-r3xh-3r3w-47gp

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