{"id":"CVE-2026-33637","state":"PUBLISHED","title":"Faraday: Protocol-relative URI objects still bypass host scoping (possible incomplete fix for GHSA-33mh-2634-fwr2)","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.","publishedAt":"2026-05-19T17:44:42.557Z","updatedAt":"2026-05-19T18:37:22.100Z","severity":{"score":0,"label":"None","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["lostisland faraday"],"affected":[{"vendor":"lostisland","product":"faraday","versions":[{"version":">= 2.0.0, <= 2.14.2","status":"affected"}]}],"references":["https://github.com/lostisland/faraday/security/advisories/GHSA-5rv5-xj5j-3484","https://github.com/advisories/GHSA-33mh-2634-fwr2"],"weaknesses":["CWE-918"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/33xxx/CVE-2026-33637.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33637","state":"PUBLISHED","datePublished":"2026-05-19T17:44:42.557Z","dateUpdated":"2026-05-19T18:37:22.100Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-23T14:24:11.619Z"},"containers":{"cna":{"title":"Faraday: Protocol-relative URI objects still bypass host scoping (possible incomplete fix for GHSA-33mh-2634-fwr2)","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"lostisland","product":"faraday","versions":[{"version":">= 2.0.0, <= 2.14.2","status":"affected"}]}],"references":[{"url":"https://github.com/lostisland/faraday/security/advisories/GHSA-5rv5-xj5j-3484","name":"https://github.com/lostisland/faraday/security/advisories/GHSA-5rv5-xj5j-3484","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/advisories/GHSA-33mh-2634-fwr2","name":"https://github.com/advisories/GHSA-33mh-2634-fwr2","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":0,"baseSeverity":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-05-19T17:44:42.557Z"},"source":{"advisory":"GHSA-5rv5-xj5j-3484","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/lostisland/faraday/security/advisories/GHSA-5rv5-xj5j-3484","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-19T18:36:58.299461Z","id":"CVE-2026-33637","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-19T18:37:22.100Z"}}]}}}