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Vulnerability record · CVE-2026-33637 · published 19 May 2026

CVE-2026-33637: Faraday project faraday server-side request forgery (ssrf) vulnerability

Faraday Project · Faraday

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.

6.5 CVSS 3.1 Medium EPSS 0.29% · top 80.2% CWE-918 · Server-side request forgery (SSRF)
6.5CVSS 3.1 base score
0.29%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 2 tagged exploit
24 Jul 2026Last modified by NVD

Description

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-33637), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.