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VulnerabilityPublished

CVE-2026-120642: CGI (Perl module) · Improper Use of Validation Framework

Affects CGI (Perl module)Source CVE Database V5

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Not known to be exploited : upgrade to 5.00 when convenient.

Data as of 4 Nov 2026, 01:00 UTC

Severity
Medium

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

  1. Disclosed: evidence found.

    CVE published 3 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
CGIAffected
  • <5.00
Fixed in
  • 5.00
CPANCGIpkg:cpan/CGIOther threatsAffected
  • <5.00
Fixed in
  • 5.00

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 is fixed. No other mitigation is specified or required according to the available data.

Description

CGI versions prior to 5.00 for Perl improperly return certain request-derived values as untainted under Perl's taint mode. This includes upload filenames, uploadInfo values, some path_info and script_name values, Accept headers, name lists from url_param and cookie, and a cookie named expires from version 4.67 onward. These values originate from regex captures or hash keys, which Perl does not mark as tainted, allowing them to bypass -T taint checks without validation.

References

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