UBUNTU-CVE-2026-120643

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    UBUNTU-CVE-2026-120643

    Published: 4 Nov 2026Last Modified: 5 Nov 2026
    Upstream:
    CVE-2026-120643

    Summary:

    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://ubuntu.com/security/CVE-2026-120643, https://www.cve.org/CVERecord?id=CVE-2026-120643, https://lists.security.metacpan.org/cve-announce/msg/44874955/, https://github.com/leejo/CGI.pm/commit/851430be84c4d0f350681814e1d7718b9959f2c2, https://github.com/leejo/CGI.pm/commit/851430be84c4d0f350681814e1d7718b9959f2c2.patch, https://metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI.pm, https://metacpan.org/release/LEEJO/CGI-5.00/changes

    Affected packages

    Package

    Name: libcgi-pm-perl

    Purl: pkg:deb/ubuntu/libcgi-pm-perl?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    4.21-1

    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
    UBUNTU-CVE-2026-120643 | CVE-DB