CVE-2026-120637: CGI versions before 5.00 for Perl take request parameters from the process command line arguments
Source GCVE Database
Not known to be exploited : upgrade to 5.00 when convenient.
Data as of 4 Nov 2026, 01:58 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
Users should consider upgrading to CGI version 5.00 or later where this behavior is presumably corrected. If you cannot patch yet, avoid using unrecognized HTTP methods with affected CGI versions or disable the offline debugging mode if possible.
Description
CGI versions for Perl prior to 5.00 improperly handle unrecognized REQUEST_METHOD values by taking request parameters from the process command line arguments. Specifically, for methods like OPTIONS, CGI defaults to an offline debugging mode that is enabled by default and constructs parameters and path_info from the command line arguments.