Pitchfork HTTP Request/Response Splitting vulnerability
Priority LOW 20CWE-113Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.0 · CNA. Fix status from CNA and GitHub.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00291 21st percentileScored 2026-11-07
Fix Fixed pitchfork (Shopify): 0.11.0pitchfork (RubyGems): 0.11.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| remix-run | pitchfork | before 0.11.0 | 0.11.0 | Patch available | CNA |
| — | pitchfork (RubyGems) | before 0.11.0 | 0.11.0 | Patch available | GHSA-pfqj-w6r6-g86v |
- pitchfork Vendorremix-run Affected before 0.11.0 Fixed in 0.11.0 Patch available CNA
- pitchfork (RubyGems) Vendor— Affected before 0.11.0 Fixed in 0.11.0 Patch available GHSA-pfqj-w6r6-g86v
Remediation
- Fix · CNA pitchfork (Shopify) Fixed in 0.11.0
- Fix · GHSA-pfqj-w6r6-g86v pitchfork (RubyGems) Fixed in 0.11.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-30221
- 2026-10-03 Alias added: GHSA-pfqj-w6r6-g86v
References
More remix-run vulnerabilities
- TI-2025-28449 React Router allows pre-render data spoofing on React-Router framework mode CVSS 3.1HIGH 8.2
- TI-2025-28448 React Router allows a DoS via cache poisoning by forcing SPA mode CVSS 3.1HIGH 7.5
- TI-2025-38117 React Router has Path Traversal in File Session Storage CVSS 3.1CRITICAL 9.1
- TI-2026-40200 React Router: Unauthenticated Denial of Service via Inefficient Route Matching CVSS 4.0HIGH 8.7
- TI-2025-33550 Job Iteration API is vulnerable to OS Command Injection attack through its CsvEnumerator class CVSS 4.0HIGH 8.1
- TI-2026-26385 Ruby LSP has arbitrary code execution through branch setting CVSS 4.0HIGH 7.1
Sources
- CVE-2025-30221 · CVE Program
- CVE-2025-30221 · NVD
- FIRST EPSS
- GHSA-pfqj-w6r6-g86v · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences