CVE-2026-122233: medium-severity vulnerability in php frankenphp
FrankenPHP before 1.13.4 Cross-Request Response Header Leak in Worker Mode
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.3epss 0.2%
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.
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
Affected products
php · frankenphpRelated CVEs — php frankenphp
In the same product, most dangerous first.
CVE-2026-45062HIGHFrankenPHP: Unsafe Unicode Handling in CGI Path Splitting Allows Execution of Non-PHP FilesEPSS 0.7%CVE-2026-24895HIGHFrankenPHP affected by Path Confusion via Unicode casing in CGI path splitting allows execution of arbitrary filesEPSS 0.7%CVE-2026-24894HIGHFrankenPHP leaks session data between requests in worker modeEPSS 0.5%CVE-2026-82416HIGHFrankenPHP: Cross-request PHP session ID leak in worker mode when the session extension is a shared moduleEPSS 0.3%CVE-2026-85733MEDIUMFrankenPHP: Docker images serve phpinfo() as the default index.php, leaking environment variablesEPSS 0.2%
References
https://github.com/php/frankenphp/commit/3fade63bb1c1d246926ed8a00520015f94cdc819https://github.com/php/frankenphp/releases/tag/v1.13.4https://github.com/php/frankenphp/security/advisories/GHSA-pmvg-8483-mw84https://www.vulncheck.com/advisories/frankenphp-before-1.13.4-cross-request-response-header-leak-in-worker-mode