FrankenPHP leaks session data between requests in worker mode
Priority MEDIUM 44CWE-269Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Privilege escalation, Spoofing, Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-269, CWE-384 and CWE-613.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00497 42nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed frankenphp (php): 1.11.2github.com/dunglas/frankenphp (Go): 1.11.2
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| PHP | frankenphp | before 1.11.2 | 1.11.2 | Patch available | CNA |
| — | github.com/dunglas/frankenphp (Go) | before 1.11.2 | 1.11.2 | Patch available | GHSA-r3xh-3r3w-47gp |
- frankenphp VendorPHP Affected before 1.11.2 Fixed in 1.11.2 Patch available CNA
- github.com/dunglas/frankenphp (Go) Vendor— Affected before 1.11.2 Fixed in 1.11.2 Patch available GHSA-r3xh-3r3w-47gp
Remediation
- Fix · CNA frankenphp (php) Fixed in 1.11.2
- Fix · GHSA-r3xh-3r3w-47gp github.com/dunglas/frankenphp (Go) Fixed in 1.11.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-24894
- 2026-10-03 Alias added: GHSA-r3xh-3r3w-47gp
References
More PHP Frankenphp vulnerabilities
- TI-2026-20080 FrankenPHP affected by Path Confusion via Unicode casing in CGI path splitting allows execution of arbitrary files CVSS 4.0HIGH 8.9
Sources
- CVE-2026-24894 · CVE Program
- CVE-2026-24894 · NVD
- FIRST EPSS
- GHSA-r3xh-3r3w-47gp · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences