CVE-2026-120632

    Dashboard / Vulnerabilities / CVE-2026-120632

    CVE-2026-120632

    Published: 3 Nov 2026Last Modified: 7 Nov 2026

    Summary: CGI versions before 5.00 for Perl allow CPU exhaustion via a backtracking regex on the XForms multipart/related Content-Type

    Details: CGI versions before 5.00 for Perl allow CPU exhaustion via a backtracking regex on the XForms multipart/related Content-Type. When a POST Content-Type contains multipart/related, the boundary and start parameters are extracted with an unanchored pattern that puts .+ on either side of the boundary capture, which backtracks in cubic time on a header that does not match. No request body is needed.

    References: https://cpan.org/modules, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/120xxx/CVE-2026-120632.json, https://metacpan.org/release/LEEJO/CGI-5.00/changes, https://nvd.nist.gov/vuln/detail/CVE-2026-120632, https://github.com/leejo/CGI.pm/commit/1e529c7ac8d410a51b4b04ab9d6cc00d51ef33c0.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 -1e529c7ac8d410a51b4b04ab9d6cc00d51ef33c0

    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-2026-120632 | CVE-DB