CVE-2026-120645: CGI versions before 5.00 for Perl allow denial of service via submitted values used as a regex for
Source GCVE Database
Not known to be exploited : upgrade to 5.00 soon.
Data as of 4 Nov 2026, 01:58 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or none- Patch
- Available – fixed in 5.00
Exploitation evidence
Disclosed: evidence found.
CVE published 3 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.
What to do
Upgrade CGI (Perl module) to 5.00.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| CGI | Affected
| Fixed in
|
CPANCGIpkg:cpan/CGIOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Users should avoid using CGI versions prior to 5.00 or apply manual mitigations such as sanitizing or escaping user input before it is used in regex patterns.
Description
CGI versions prior to 5.00 for Perl contain a denial of service vulnerability. This occurs when submitted values are used as regular expressions for optgroup selection in the scrolling_list function without proper escaping. Malicious input can cause the process to crash or become unresponsive due to heavy regex backtracking.