CVE-2026-120636

    Dashboard / Vulnerabilities / CVE-2026-120636

    CVE-2026-120636

    Published: 3 Nov 2026Last Modified: 7 Nov 2026

    Summary: CGI versions before 5.00 for Perl allow open redirects and script injection via URLs built from REQUEST_URI in url and start_form

    Details: CGI versions before 5.00 for Perl allow open redirects and script injection via URLs built from REQUEST_URI in url and start_form. url(-absolute=>1), url(-relative=>1) and the default start_form action are built from the client-supplied REQUEST_URI without validation. The result can be protocol-relative (//evil.example), absolute-form (http://evil.example/) or contain backslashes, and url(-relative=>1) can return a javascript: URL. Links and form posts built from these URLs can go to another host.

    References: https://cpan.org/modules, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/120xxx/CVE-2026-120636.json, https://metacpan.org/release/LEEJO/CGI-5.00/changes, https://nvd.nist.gov/vuln/detail/CVE-2026-120636, https://github.com/leejo/CGI.pm/commit/9405ef3909ee94991a3474167aa53b9051bd8765.patch, https://github.com/leejo/CGI.pm, https://metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI.pm

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -9405ef3909ee94991a3474167aa53b9051bd8765

    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-2026-120636 | CVE-DB