CVE-2026-120645

HighCVSS 7.5/10Last modified Nov 9, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-625 CWE-1333

Affected software

Vendor	Product	Versions
—	—	< 5.00

References

Timeline

Published: Nov 4, 2026
Last modified: Nov 9, 2026
NVD status: Deferred

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