CVE-2026-120647: CGI (Perl module) · Improper Encoding or Escaping of Output
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, 00:59 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 vulnerability has been fixed by properly escaping double quotes in the attachment filename parameter. No other mitigation is indicated.
Description
CGI versions prior to 5.00 for Perl contain a vulnerability where unescaped double quotes in the Content-Disposition header's attachment filename parameter allow injection of a second filename parameter. This occurs because the header function writes the attachment name directly into the quoted filename parameter without escaping double quotes, potentially altering the filename under which a response is saved.