UBUNTU-CVE-2026-120646

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    UBUNTU-CVE-2026-120646

    Published: 4 Nov 2026Last Modified: 5 Nov 2026
    Upstream:
    CVE-2026-120646

    Summary:

    Details: CGI versions from 4.71 before 5.00 for Perl allow denial of service via a plain string dereferenced as a symbolic reference in uploadInfo. uploadInfo dereferences its argument and calls its filename method without checking that it is an upload filehandle. A plain string naming a defined global variable, such as the parameter value from ?upload=0, is treated as a symbolic reference, and the method call on it dies.

    References: https://ubuntu.com/security/CVE-2026-120646, https://www.cve.org/CVERecord?id=CVE-2026-120646, https://lists.security.metacpan.org/cve-announce/msg/44874987/, https://github.com/leejo/CGI.pm/commit/a14a7decfdc18f2daf436d30df9b543e3f0f8da3, https://github.com/leejo/CGI.pm/commit/a14a7decfdc18f2daf436d30df9b543e3f0f8da3.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-2026-120646 | CVE-DB