---
id: CVE-2026-120650
title: >-
  CGI versions before 5.00 for Perl allow memory, CPU and disk exhaustion via
  missing or unenforced request size, parameter and upload limits
summary: >-
  CGI versions before 5.00 for Perl allow memory, CPU and disk exhaustion via
  missing or unenforced request size, parameter and upload limits.


  $CGI::POST_MAX defaults to no limit, and when set is not enforced for chunked
  multipart bodies …
severity: none
cwe:
  - CWE-770
product: CGI
affected:
  - CGI < 5.00
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T23:41:14.474Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-120650'
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/17b838dc14d2b82ae6c7e76f66ec2c3f3b08038b.patch
  - url: >-
      https://github.com/leejo/CGI.pm/commit/f3febefe63fe3881d8c3ae10fa83ca8ec950b959.patch
  - url: >-
      https://github.com/leejo/CGI.pm/commit/277baeb74fde7bce975a7bd0a1f98dcf1b9b2050.patch
  - url: >-
      https://github.com/leejo/CGI.pm/commit/8940a74e53a41563f72813b45f99cceaaa4c92e8.patch
tags:
  - cve.org
epss: 0.00185
epssPercentile: 0.08145
ingestedAt: '2026-11-05T20:33:06.624Z'
---

## Overview

CGI versions before 5.00 for Perl allow memory, CPU and disk exhaustion via missing or unenforced request size, parameter and upload limits.

$CGI::POST_MAX defaults to no limit, and when set is not enforced for chunked multipart bodies or for the boundary line of a multipart body without a boundary= parameter. Bodies saved as PUTDATA, POSTDATA or PATCHDATA uploads are read into memory in one go, and nothing limits the number of parameters or uploads.

## Affected

- `CGI < 5.00`

## Remediation

Upgrade to CGI 5.00 or later.

### Workarounds

For deployments that cannot upgrade, limit the request body size at the web server and set $CGI::POST_MAX.