CVE-2025-30221
Pitchfork HTTP Request/Response Splitting vulnerability
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Pitchfork HTTP Request/Response Splitting vulnerability
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.
- Record
CVE-2025-30221- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N - Weakness
- CWE-113
- Updated
- 2026-11-02
EUVDEUVD-2025-14808
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.
- Record
EUVD-2025-14808- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-pfqj-w6r6-g86v
Pitchfork HTTP Request/Response Splitting vulnerability
Impact
HTTP Response Header Injection in Pitchfork Versions < 0.11.0 when used in conjunction with Rack 3
Patches
The issue was fixed in Pitchfork release 0.11.0
Workarounds
There are no known work arounds. Users must upgrade.
- Record
GHSA-pfqj-w6r6-g86v- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N - Weakness
- CWE-113
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2025-30221- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N - Weakness
- CWE-113
- Updated
- 2026-11-02
OSV
Pitchfork HTTP Request/Response Splitting vulnerability
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.
- Record
CVE-2025-30221- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N - Weakness
- CWE-113
- Updated
- 2026-11-02
OSVGHSA-pfqj-w6r6-g86v
Pitchfork HTTP Request/Response Splitting vulnerability
Impact
HTTP Response Header Injection in Pitchfork Versions < 0.11.0 when used in conjunction with Rack 3
Patches
The issue was fixed in Pitchfork release 0.11.0
Workarounds
There are no known work arounds. Users must upgrade.
- Record
GHSA-pfqj-w6r6-g86v- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N - Weakness
- CWE-113
- Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-30221 is a medium vulnerability (CVSS 4.3) in Shopify Pitchfork, published March 27, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.29%, the 21st percentile. Fixed in pitchfork 0.11.0.
References
github.com/Shopify/pitchfork/security/advisories/GHSA-pfqj-w6r6-g86v
nvd.nist.gov/vuln/detail/CVE-2025-30221