CGI::Cookie versions from 4.67 before 5.00 for Perl allow denial of service via the client cookie expires value used as a regex in parse
Summary
| CVE | CVE-2026-120631 |
|---|---|
| State | PUBLISHED |
| Assigner | CPANSec |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-11-04 00:17:24 UTC |
| Updated | 2026-11-04 18:42:35 UTC |
| Description | CGI::Cookie versions from 4.67 before 5.00 for Perl allow denial of service via the client cookie expires value used as a regex in parse. CGI's cookie method reads the Cookie request header through parse, which interpolates the header's expires value unescaped into the substitution pattern that removes it from the cookie string. A client can make the request die with an invalid pattern, or tie up the process with one that backtracks catastrophically. |
Risk And Classification
EPSS: 0.003890000 probability, percentile 0.331290000 (date 2026-11-04)
Problem Types: CWE-625 | CWE-1333 | CWE-1333 CWE-1333 Inefficient Regular Expression Complexity | CWE-625 CWE-625 Permissive Regular Expression
There are no known software configurations currently associated with this CVE in NVD or the CVE Program record.
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| metacpan.org/release/LEEJO/CGI-5.00/changes | 9b29abf9-4ab0-4765-b253-1875cd9b441e | metacpan.org | |
| metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI/Cookie.pm | 9b29abf9-4ab0-4765-b253-1875cd9b441e | metacpan.org | |
| github.com/leejo/CGI.pm/commit/95e044af2ec24d99a61e99d6291580ad47aff641.... | 9b29abf9-4ab0-4765-b253-1875cd9b441e | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
Solutions
CNA: Upgrade to CGI 5.00 or later.
There are currently no legacy QID mappings associated with this CVE.