CVE-2026-120637: CGI (Perl module) · Active Debug Code
Affects CGI (Perl module)Source CVE Database V5
Not known to be exploited : upgrade to 5.00 when convenient.
Data as of 4 Nov 2026, 01:00 UTC
Rated Medium 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
Upgrade to CGI version 5.00 or later, where this issue has been fixed. Since the vulnerability is addressed in version 5.00, applying this official fix is the recommended remediation.
Description
CGI versions prior to 5.00 for Perl contain active debug code that is triggered when an unrecognized REQUEST_METHOD is received. Specifically, for methods like OPTIONS, the software enters an offline debugging mode by default, using command line arguments to build parameters and path_info, which could lead to unintended behavior.