{"id":"CVE-2026-25765","aliases":["GHSA-33mh-2634-fwr2"],"url":"https://o3.security/vulnerability/CVE-2026-25765","summary":"Faraday affected by SSRF via protocol-relative URL host override in build_exclusive_url","details":"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.","published":"2026-02-09T20:30:58.774Z","modified":"2026-07-15T01:49:14.081773709Z","cvss":{"score":5.8,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"RubyGems","name":"faraday","fixedVersion":"2.14.1"},{"ecosystem":"RubyGems","name":"faraday","fixedVersion":"1.10.5"}],"fix":{"url":"https://github.com/lostisland/faraday/commit/a6d3a3a0bf59c2ab307d0abd91bc126aef5561bc","label":"lostisland/faraday@a6d3a3a"},"references":[{"type":"WEB","url":"https://github.com/lostisland/faraday/releases/tag/v2.14.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25765.json"},{"type":"ADVISORY","url":"https://github.com/lostisland/faraday/security/advisories/GHSA-33mh-2634-fwr2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25765"},{"type":"FIX","url":"https://github.com/lostisland/faraday/commit/a6d3a3a0bf59c2ab307d0abd91bc126aef5561bc"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:14.081773709Z"}}