---
id: CVE-2026-120637
title: >-
  CGI versions before 5.00 for Perl take request parameters from the process
  command line arguments for an unrecognised REQUEST_METHOD
summary: >-
  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 …
severity: none
cwe:
  - CWE-489
product: CGI
affected:
  - CGI < 5.00
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T23:40:24.493Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-120637'
references:
  - url: 'https://metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI.pm'
  - url: 'https://metacpan.org/release/LEEJO/CGI-5.00/changes'
  - url: >-
      https://github.com/leejo/CGI.pm/commit/b753ff75a3bc4554c075cc37c1db605a55297029.patch
tags:
  - cve.org
epss: 0.00191
epssPercentile: 0.08791
ingestedAt: '2026-11-05T20:33:06.615Z'
---

## Overview

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.

## Affected

- `CGI < 5.00`

## Remediation

Upgrade to CGI 5.00 or later.