{"id":"UBUNTU-CVE-2026-33637","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.","modified":"2026-05-25T09:30:08.001254793Z","published":"2026-05-19T19:16:00Z","upstream":["CVE-2026-33637"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-33637"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-33637"},{"type":"REPORT","url":"https://github.com/advisories/GHSA-33mh-2634-fwr2"},{"type":"REPORT","url":"https://github.com/lostisland/faraday/security/advisories/GHSA-5rv5-xj5j-3484"}],"affected":[{"package":{"name":"ruby-faraday","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/ruby-faraday?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.8.7-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-faraday","binary_version":"0.8.7-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33637.json"}},{"package":{"name":"ruby-faraday","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/ruby-faraday?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.1-1","0.9.2-3"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-faraday","binary_version":"0.9.2-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33637.json"}},{"package":{"name":"ruby-faraday","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/ruby-faraday?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.2-3"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-faraday","binary_version":"0.9.2-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33637.json"}},{"package":{"name":"ruby-faraday","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/ruby-faraday?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.15.4-3","0.15.4-3ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-faraday","binary_version":"0.15.4-3ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33637.json"}},{"package":{"name":"ruby-faraday","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/ruby-faraday?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.0-6","1.1.0-7"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-faraday","binary_version":"1.1.0-7"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33637.json"}},{"package":{"name":"ruby-faraday","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/ruby-faraday?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.0-7","2.7.1-2"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-faraday","binary_version":"2.7.1-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33637.json"}},{"package":{"name":"ruby-faraday","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/ruby-faraday?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.10.0-2","2.12.2-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-faraday","binary_version":"2.12.2-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33637.json"}},{"package":{"name":"ruby-faraday","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/ruby-faraday?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.12.2-1","2.14.0-1","2.14.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-faraday","binary_version":"2.14.1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-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"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}