CVE-2026-120643

    Dashboard / Vulnerabilities / CVE-2026-120643

    CVE-2026-120643

    Published: 3 Nov 2026Last Modified: 7 Nov 2026

    Summary: CGI versions from 4.62 before 5.00 for Perl allow cross-site scripting via a raw apostrophe in URLs returned by url and self_url

    Details: CGI versions from 4.62 before 5.00 for Perl allow cross-site scripting via a raw apostrophe in URLs returned by url and self_url. Both pass the URL through URI's canonical method, which leaves an apostrophe in the path raw and decodes the %27 that query parameter escaping produces, so an apostrophe in the request path or a parameter appears raw in the result. An application that places the URL in a single-quoted HTML attribute or JavaScript string is open to cross-site scripting.

    References: https://cpan.org/modules, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/120xxx/CVE-2026-120643.json, https://metacpan.org/release/LEEJO/CGI-5.00/changes, https://nvd.nist.gov/vuln/detail/CVE-2026-120643, https://github.com/leejo/CGI.pm/commit/851430be84c4d0f350681814e1d7718b9959f2c2.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 -851430be84c4d0f350681814e1d7718b9959f2c2

    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-2026-120643 | CVE-DB