---
id: CVE-2026-73232
title: ffuf is a fast web fuzzer written in Go
summary: >-
  ffuf is a fast web fuzzer written in Go. Prior to 2.2.0, ffuf allows a
  malicious target server to cause an out-of-memory denial of service because
  the response size guard in pkg/runner/simple.go checks only the compressed
  Content-Length …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-409
vendor: ffuf
product: github.com/ffuf/ffuf/v2
affected:
  - github.com/ffuf/ffuf/v2 <= 2.1.0
  - github.com/ffuf/ffuf <= 1.5.0
patched:
  - github.com/ffuf/ffuf/v2 2.2.0
published: '2026-08-11'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T20:09:01.757'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73232'
references:
  - url: >-
      https://github.com/ffuf/ffuf/commit/fb0da86c60443b0dddbc9a86e91e3a6487dff79b
    label: security-advisories@github.com
  - url: 'https://github.com/ffuf/ffuf/pull/897'
    label: security-advisories@github.com
  - url: 'https://github.com/ffuf/ffuf/releases/tag/v2.2.0'
    label: security-advisories@github.com
  - url: 'https://github.com/ffuf/ffuf/security/advisories/GHSA-jcvh-xf52-2cwm'
    label: security-advisories@github.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73232'
  - url: 'https://github.com/advisories/GHSA-jcvh-xf52-2cwm'
tags:
  - nvd
  - ghsa
  - go
epss: 0.00441
epssPercentile: 0.37719
aliases:
  - GHSA-jcvh-xf52-2cwm
ecosystem: go
ingestedAt: '2026-09-03T18:06:41.848Z'
---

## Overview

ffuf is a fast web fuzzer written in Go. Prior to 2.2.0, ffuf allows a malicious target server to cause an out-of-memory denial of service because the response size guard in pkg/runner/simple.go checks only the compressed Content-Length while io.ReadAll reads gzip, brotli, deflate, transparently decompressed, or chunked response bodies without a decompressed-size bound. This issue is fixed in version 2.2.0.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-73232)

Affected packages:

- `github.com/ffuf/ffuf/v2 <= 2.1.0`
- `github.com/ffuf/ffuf <= 1.5.0`

Patched in:

- `github.com/ffuf/ffuf/v2 2.2.0`

Source: https://github.com/advisories/GHSA-jcvh-xf52-2cwm