CVE-2026-122233

    Dashboard / Vulnerabilities / CVE-2026-122233

    CVE-2026-122233

    Published: 4 Nov 2026Last Modified: 6 Nov 2026

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

    Details: 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://github.com/CVEProject/cvelistV5/tree/main/cves/2026/122xxx/CVE-2026-122233.json, https://github.com/php/frankenphp/releases/tag/v1.13.4, https://github.com/php/frankenphp/security/advisories/GHSA-pmvg-8483-mw84, https://nvd.nist.gov/vuln/detail/CVE-2026-122233, https://www.vulncheck.com/advisories/frankenphp-before-1.13.4-cross-request-response-header-leak-in-worker-mode, https://github.com/php/frankenphp/commit/3fade63bb1c1d246926ed8a00520015f94cdc819, https://github.com/php/frankenphp

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -7f50be9d86261bf7cff9b051ab4fb572e95020ed

    Affected versions

    v1.13.3
    v1.13.2
    v1.13.0
    v1.13.1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-122233 | CVE-DB