Vulnerability-Lookup

CVE-2026-122233 (GCVE-0-2026-122233)

Vulnerability from cvelistv5 – Published: 2026-11-04 21:06 – Updated: 2026-11-09 16:57

Title

FrankenPHP before 1.13.4 Cross-Request Response Header Leak in Worker Mode

Summary

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.

Severity

6.3 (Medium)


                        
                          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)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-11-09 16:09 UTC

CWE

CWE-488 - Exposure of Data Element to Wrong Session

Assigner

VulnCheck CNA

References

4 references

URL	Tags
https://github.com/php/frankenphp/security/adviso…	vendor-advisory
https://github.com/php/frankenphp/commit/3fade63b…	patch
https://github.com/php/frankenphp/releases/tag/v1.13.4	release-notes
https://www.vulncheck.com/advisories/frankenphp-b…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
php	frankenphp	Affected: 0 , < 1.13.4 (semver) cpe:2.3:a:php:frankenphp::::::::

Date Public

2026-10-26 16:53

Credits

Zachariah Mithani (AploSec)

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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CVE-2026-122233 (GCVE-0-2026-122233)

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