CVE-2026-120645
Received
Received - Intake
Denial of Service in Perl CGI via Regex Injection
Vulnerability report for CVE-2026-120645, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-11-04
Last updated on: 2026-11-04
Assigner: CPANSec
Description
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.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
Currently, no data is known.
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-625 | The product uses a regular expression that does not sufficiently restrict the set of allowed values. |
| CWE-1333 | The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential. |
