CVE-2026-120634

    Dashboard / Vulnerabilities / CVE-2026-120634

    CVE-2026-120634

    Published: 3 Nov 2026Last Modified: 7 Nov 2026

    Summary: CGI::Carp versions before 5.00 for Perl leak warnings across requests in persistent environments via the warningsToBrowser buffer

    Details: CGI::Carp versions before 5.00 for Perl leak warnings across requests in persistent environments via the warningsToBrowser buffer. Warnings are held in a package-level buffer until warningsToBrowser writes them into the page as HTML comments, and the buffer is never cleared between requests. Under mod_perl, FastCGI or PSGI, warnings from one request are written into a later one. Warnings that contain one user's request data can appear in the HTML sent to another user.

    References: https://cpan.org/modules, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/120xxx/CVE-2026-120634.json, https://metacpan.org/release/LEEJO/CGI-5.00/changes, https://nvd.nist.gov/vuln/detail/CVE-2026-120634, https://github.com/leejo/CGI.pm/commit/604a83fec105f75fe06f1a75026c4c34fd5a1f61.patch, https://github.com/leejo/CGI.pm, https://metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI/Carp.pm

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -604a83fec105f75fe06f1a75026c4c34fd5a1f61

    Affected versions

    v4.72

    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-2026-120634 | CVE-DB