---
id: CVE-2026-120642
title: >-
  CGI versions before 5.00 for Perl return request-derived values untainted
  under taint mode
summary: >-
  CGI versions before 5.00 for Perl return request-derived values untainted
  under taint mode.


  The upload filename, uploadInfo values, some path_info and script_name values,
  Accept results, and the name lists from url_param and cookie are …
severity: none
cwe:
  - CWE-1173
product: CGI
affected:
  - CGI < 5.00
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T23:40:44.224Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-120642'
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/6ae50ce84073b8f68a6e3750479de70d5b8f2dcf.patch
tags:
  - cve.org
epss: 0.00191
epssPercentile: 0.08842
ingestedAt: '2026-11-05T20:33:06.619Z'
---

## Overview

CGI versions before 5.00 for Perl return request-derived values untainted under taint mode.

The upload filename, uploadInfo values, some path_info and script_name values, Accept results, and the name lists from url_param and cookie are returned without the taint flag, as is a cookie named expires from 4.67 on.

These values come from regex captures or hash keys, which Perl does not taint, so they pass -T checks unvalidated.

## Affected

- `CGI < 5.00`

## Remediation

Upgrade to CGI 5.00 or later.