CVE-2026-120634: CGI::Carp versions before 5.00 for Perl leak warnings across requests in persistent environments via
Source GCVE Database
Not known to be exploited : upgrade to 5.00 soon.
Data as of 4 Nov 2026, 02:00 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
A fix is available in CGI::Carp version 5.00 and later. Users should upgrade to version 5.00 or newer to resolve this issue. No vendor advisory or patch links were provided, so verify the availability of the fix from the official CGI::Carp project sources.
Description
CGI::Carp versions before 5.00 for Perl have a vulnerability where warnings are leaked across requests in persistent environments such as mod_perl, FastCGI, or PSGI. This occurs because warnings are stored in a package-level buffer that is not cleared between requests, causing warnings from one user's request to appear in the HTML output of another user's request as HTML comments.
References
- nvd.nist.gov/vuln/detail/CVE-2026-120634 (opens in a new tab)
- github.com/leejo/CGI.pm/commit/604a83fec105f75fe06f1a75026c4c34fd5a1f61.patch (opens in a new tab)
- metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI/Carp.pm (opens in a new tab)
- metacpan.org/release/LEEJO/CGI-5.00/changes (opens in a new tab)