{"id":"CVE-2026-33637","summary":"Faraday: Protocol-relative URI objects still bypass host scoping (possible incomplete fix for GHSA-33mh-2634-fwr2)","details":"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.","aliases":["GHSA-5rv5-xj5j-3484"],"modified":"2026-06-18T03:56:01.840827134Z","published":"2026-05-19T17:44:42.557Z","related":["CGA-g4xg-x6cr-w829","GHSA-33mh-2634-fwr2","GHSA-5rv5-xj5j-3484"],"database_specific":{"cwe_ids":["CWE-918"],"cna_assigner":"GitHub_M","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33637.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33637.json"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-33mh-2634-fwr2"},{"type":"ADVISORY","url":"https://github.com/lostisland/faraday/security/advisories/GHSA-5rv5-xj5j-3484"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33637"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/lostisland/faraday","events":[{"introduced":"0a5714e8c89bb0aacf414ed00e70b9d70b4097e2"},{"fixed":"2ecd5e05388303087c3f6872ef7f98f260e9560f"}],"database_specific":{"extracted_events":[{"introduced":"2.0.0"},{"last_affected":"2.14.2"},{"introduced":"2.0.0"},{"fixed":"2.14.2"}],"source":["AFFECTED_FIELD","CPE_RANGE"],"cpe":"cpe:2.3:a:faraday_project:faraday:*:*:*:*:*:*:*:*"}}],"versions":["v2.14.1","v2.14.0","v2.13.4","v2.13.3","v2.13.2","v2.13.1","v2.13.0","v2.12.3","v2.12.2","v2.12.1","v2.12.0","v2.11.0","v2.10.1","v2.10.0","v2.9.2","v2.9.1","v2.9.0","v2.8.1","v2.8.0","v2.7.12","v2.7.11","v2.7.10","v2.7.9","v2.7.8","v2.7.7","v2.7.6","v2.7.5","v2.7.4","v2.7.3","v2.7.2","v2.7.1","v2.7.0","v2.6.0","v2.5.2","v2.5.1","v2.5.0","v2.4.0","v2.3.0","v2.2.0","v2.1.0","v2.0.1","v2.0.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-33637.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N"}]}