Vulnerability details

CVE-2026-120637

CGI versions before 5.00 for Perl take request parameters from the process command line arguments for an unrecognised REQUEST_METHOD

CVSS 3.1

9.8Critical

Remedy

Remedy in the CVE record (record published by: CPANSec)

Upgrade to CGI 5.00 or later.

Official description

CGI versions before 5.00 for Perl take request parameters from the process command line arguments for an unrecognised REQUEST_METHOD. For a REQUEST_METHOD such as OPTIONS, CGI falls through to its offline debugging mode, which is on by default, and builds the parameters and path_info from the process's command line arguments.

CVSS scores

Score	Version	Source	Vector
9.8Critical	3.1	CISA ADP / Vulnrichment (CISA-ADP)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
No product information recorded.

References and advisories

https://metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI.pm technical-description
https://metacpan.org/release/LEEJO/CGI-5.00/changes release-notes
https://github.com/leejo/CGI.pm/commit/b753ff75a3bc4554c075cc37c1db605a55297029.patch patch

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Details

Published: 2026-11-04
Last updated: 2026-11-09
State: Published
Assigner (CNA): CPANSec
Kolun priority: 26 · Low

Exploit prediction (EPSS)

0.52%

Probability of exploitation in 30 days

45.1%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-489
Active Debug Code