{"id":"UBUNTU-CVE-2026-63183","details":"OmniAuth is a flexible authentication system utilizing Rack middleware. Prior to 2.2.0, OmniAuth derives provider callback URLs from request-controlled host information when neither a fixed full_host nor framework-level incoming host validation is configured. A remote unauthenticated client can supply a forged Host header, creating a host header injection risk in applications whose web framework does not verify incoming host headers. Applications using appropriately configured Rails host authorization or a fixed full_host are not affected by this path. This issue is fixed in version 2.2.0.","modified":"2026-11-06T01:01:07.565893770Z","published":"2026-11-05T00:00:00Z","upstream":["CVE-2026-63183"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-63183"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-63183"},{"type":"REPORT","url":"https://github.com/omniauth/omniauth/security/advisories/GHSA-m27g-v28p-f9fx"},{"type":"REPORT","url":"https://github.com/omniauth/omniauth/commit/943b44faea242f063fa9230254fe7d60cfcc9c90"}],"affected":[{"package":{"name":"ruby-omniauth","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/ruby-omniauth?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.2-3","1.3.1-1","1.3.1-1+deb9u1build0.16.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-omniauth","binary_version":"1.3.1-1+deb9u1build0.16.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63183.json"}},{"package":{"name":"ruby-omniauth","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/ruby-omniauth?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.1-1","1.3.1-2","1.6.1-2"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-omniauth","binary_version":"1.6.1-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63183.json"}},{"package":{"name":"ruby-omniauth","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/ruby-omniauth?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.1-1","1.9.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-omniauth","binary_version":"1.9.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63183.json"}},{"package":{"name":"ruby-omniauth","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/ruby-omniauth?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.9.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-omniauth","binary_version":"1.9.1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63183.json"}},{"package":{"name":"ruby-omniauth","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/ruby-omniauth?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-omniauth","binary_version":"2.1.1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63183.json"}},{"package":{"name":"ruby-omniauth","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/ruby-omniauth?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.4-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-omniauth","binary_version":"2.1.4-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63183.json"}},{"package":{"name":"ruby-omniauth","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/ruby-omniauth?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.1-4","2.1.4-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-omniauth","binary_version":"2.1.4-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63183.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:L/SA:N"},{"type":"Ubuntu","score":"medium"}]}