SSRF in Faraday Project
CVE-2026-25765
Faraday is an HTTP client library abstraction layer that provides a common interface over many adapters. Prior to 2.14.1, Faraday's build_exclusive_url method (in lib/faraday/connection.rb) uses Ruby's URI#merge to combine the connection's base URL with a user-supplied path. Per RFC 3986, protocol-relative URLs (e.g. //evil.com/path) are treated as network-path references that override the base URL's host/authority component. This means that if any application passes user-controlled input to Faraday's get(), post(), build_url(), or other request methods, an attacker can supply a protocol-relative URL like //attacker.com/endpoint to redirect the request to an arbitrary host, enabling Server-Side Request Forgery (SSRF). This vulnerability is fixed in 2.14.1.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (30.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Faraday Project
- Lostisland Faraday — versions < 2.14.1
Weakness classification (CWE)
References
- github.com/lostisland/faraday/security/advisories/GHSA-33mh-2634-fwr2 (Mitigation, Vendor Advisory)
- github.com/lostisland/faraday/commit/a6d3a3a0bf59c2ab307d0abd91bc126aef5561bc (Patch)
- github.com/lostisland/faraday/releases/tag/v2.14.1 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-25765?
- CVE-2026-25765 is a medium-severity vulnerability in Faraday Project, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.8/10. Published 2026-02-09.
- How severe is CVE-2026-25765?
- Medium severity. CVSS v3 base score is 5.8 out of 10.