CVE-2026-120632
Severity not reportedCGI versions before 5.00 for Perl allow CPU exhaustion via a backtracking regex on the XForms multipart/related Content-Type.
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.
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/leejo/CGI.pm/commit/1e529c7ac8d410a51b4b04ab9d6cc00d51ef33c0.patch 9b29abf9-4ab0-4765-b253-1875cd9b441e
- https://metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI.pm 9b29abf9-4ab0-4765-b253-1875cd9b441e
- https://metacpan.org/release/LEEJO/CGI-5.00/changes 9b29abf9-4ab0-4765-b253-1875cd9b441e

