CVE-2026-33637

Faraday is an HTTP client library abstraction layer that provides a common interface over many adapters. Versions 2.0.0 through 2.14.1 still allow protocol-relative host override when the request target is passed as a URI object (rather than a String) to Faraday::Connection#build_exclusive_url. This bypasses the February 2026 fix for GHSA-33mh-2634-fwr2 and enables off-host request forgery: a request built from a fixed-base Faraday::Connection can be redirected to an attacker-controlled host, forwarding connection-scoped values such as Authorization headers and default query parameters. This issue has been fixed in version 2.14.3.

CVSS

No CVSS.

References

Link	Resource
https://github.com/advisories/GHSA-33mh-2634-fwr2	Vendor Advisory
https://github.com/lostisland/faraday/security/advisories/GHSA-5rv5-xj5j-3484	Exploit Vendor Advisory
https://github.com/lostisland/faraday/security/advisories/GHSA-5rv5-xj5j-3484	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:faraday_project:faraday:*:*:*:*:*:*:*:*

History

21 May 2026, 20:17

Type	Values Removed	Values Added
First Time		Faraday Project Faraday Project faraday
CPE		cpe:2.3:a:faraday_project:faraday::::::::
References	~~() https://github.com/advisories/GHSA-33mh-2634-fwr2 -~~	() https://github.com/advisories/GHSA-33mh-2634-fwr2 - Vendor Advisory
References	~~() https://github.com/lostisland/faraday/security/advisories/GHSA-5rv5-xj5j-3484 -~~	() https://github.com/lostisland/faraday/security/advisories/GHSA-5rv5-xj5j-3484 - Exploit, Vendor Advisory

19 May 2026, 19:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-19 19:16

Updated : 2026-05-21 20:17

NVD link : CVE-2026-33637

Mitre link : CVE-2026-33637

CVE.ORG link : CVE-2026-33637

JSON object : View

Products Affected

faraday_project

faraday

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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