---
id: CVE-2026-120644
title: >-
  CGI::Cookie versions before 5.00 for Perl allow cookie attribute injection via
  unvalidated path, domain and expires values
summary: >-
  CGI::Cookie versions before 5.00 for Perl allow cookie attribute injection via
  unvalidated path, domain and expires values.


  The path, domain and expires values are written into the Set-Cookie header
  without checking for semicolons or co…
severity: none
cwe:
  - CWE-116
product: CGI
affected:
  - CGI < 5.00
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T23:40:51.418Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-120644'
references:
  - url: 'https://metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI/Cookie.pm'
  - url: 'https://metacpan.org/release/LEEJO/CGI-5.00/changes'
  - url: >-
      https://github.com/leejo/CGI.pm/commit/0b3527faaa9de55f79ca7d59dd3bcfb2c5540e00.patch
tags:
  - cve.org
epss: 0.00205
epssPercentile: 0.10597
ingestedAt: '2026-11-05T20:33:06.618Z'
---

## Overview

CGI::Cookie versions before 5.00 for Perl allow cookie attribute injection via unvalidated path, domain and expires values.

The path, domain and expires values are written into the Set-Cookie header without checking for semicolons or control characters.

An application that sets them from request data can be made to add other cookie attributes, such as Domain or SameSite.

## Affected

- `CGI < 5.00`

## Remediation

Upgrade to CGI 5.00 or later.