CGI versions before 5.00 for Perl allow denial of service via submitted values used as a regex for optgroup selection in scrolling_list
Summary
| CVE | CVE-2026-120645 |
|---|---|
| State | PUBLISHED |
| Assigner | CPANSec |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-11-04 00:17:26 UTC |
| Updated | 2026-11-04 18:42:35 UTC |
| Description | CGI versions before 5.00 for Perl allow denial of service via submitted values used as a regex for optgroup selection in scrolling_list. When rendering option groups, scrolling_list marks the selected options by interpolating each selected value, by default taken from the request parameters, unescaped into a substitution pattern. A client can make the request die with an invalid pattern, or tie up the process with one that backtracks heavily. |
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 | |
| github.com/leejo/CGI.pm/commit/824956fbb0c4eb77044ba2dc9180a30df12cb309.... | 9b29abf9-4ab0-4765-b253-1875cd9b441e | github.com | |
| metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI.pm | 9b29abf9-4ab0-4765-b253-1875cd9b441e | metacpan.org | |
| 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.