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CVE-2026-122233FrankenPHP before 1.13.4 Cross-Request Response Header Leak in Worker Mode
FrankenPHP before 1.13.4 contains an information disclosure vulnerability in worker mode that fails to clear last HTTP stream response headers between requests, because the reset only happens in RSHUTDOWN, which worker requests skip. Later requests calling http_get_last_response_headers() can read headers fetched by earlier requests on the same worker thread, exposing other users' Set-Cookie or token headers from backend APIs.
6.3 MEDIUMEPSS 0.23%Not in KEVNVD: Deferred
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 6.3 | MEDIUM | 4.0VulnCheck (CNA) | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N |
| 3.7 | LOW | 3.1VulnCheck (CNA) | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N |
Details
- CVE ID
- CVE-2026-122233
- Status
- Deferred
- Assigner (CNA)
- VulnCheck
- Published
- Nov 4, 2026
- Last modified
- 2026-11-04 21:18 UTC
- Weaknesses
- CWE-488 · Exposure of Data Element to Wrong Session
Affected Products
As published by the CNA in the CVE record.
phpfrankenphp1 version range
- before 1.13.4
References
- github.com https://github.com/php/frankenphp/commit/3fade63bb1c1d246926ed8a00520015f94cdc819
- github.com https://github.com/php/frankenphp/releases/tag/v1.13.4
- github.com https://github.com/php/frankenphp/security/advisories/GHSA-pmvg-8483-mw84
- vulncheck.com https://www.vulncheck.com/advisories/frankenphp-before-1.13.4-cross-request-response-header-leak-in-worker-mode