CVE-2026-122233

medium

Description

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.

References

https://www.vulncheck.com/advisories/frankenphp-before-1.13.4-cross-request-response-header-leak-in-worker-mode

https://github.com/php/frankenphp/security/advisories/GHSA-pmvg-8483-mw84

https://github.com/php/frankenphp/releases/tag/v1.13.4

https://github.com/php/frankenphp/commit/3fade63bb1c1d246926ed8a00520015f94cdc819

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-117119

Details

Source: Mitre, NVD

Published: 2026-11-04

Updated: 2026-11-09

Risk Information

CVSS v2

Base Score: 2.6

Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:N/A:N

Severity: Low

CVSS v3

Base Score: 3.7

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Severity: Low

CVSS v4

Base Score: 6.3

Vector: 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

Severity: Medium

EPSS

EPSS: 0.00233