{"id":"CVE-2026-63183","aliases":["DEBIAN-CVE-2026-63183","EUVD-2026-117054","GHSA-m27g-v28p-f9fx","UBUNTU-CVE-2026-63183"],"status":"published","title":"OmniAuth: Host Header Injection Vulnerability","description":"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.","severity":{"version":"4.0","score":6.9,"vector":"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00181,"percentile":0.07711,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-346"],"published":"2026-11-04T19:07:04.712Z","modified":"2026-11-09T22:00:06Z","fixes":[{"ecosystem":"RubyGems","package":"omniauth","fixed_in":["2.2.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"RubyGems","package":"omniauth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"ruby-omniauth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.1-1","2.1.1-2","2.1.1-3","2.1.1-4","2.1.4-1"]},{"source":"osv","ecosystem":"Debian:13","package":"ruby-omniauth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.1-4","2.1.4-1"]},{"source":"osv","ecosystem":"Debian:14","package":"ruby-omniauth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.1-4","2.1.4-1"]},{"source":"osv","ecosystem":"RubyGems","package":"omniauth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.0"}]}],"versions":["0.0.1","0.0.3","0.0.4","0.0.5","0.1.0","0.1.1","0.1.2","0.1.3","0.1.4","0.1.5","0.1.6","0.2.0","0.2.0.beta1","0.2.0.beta2","0.2.0.beta3","0.2.0.beta4","0.2.0.beta5","0.2.1","0.2.2","0.2.3","0.2.4","0.2.5","0.2.6","0.3.0","0.3.0.rc3","0.3.2","1.0.0","1.0.0.beta1","1.0.0.pr1","1.0.0.pr2","1.0.0.rc1","1.0.0.rc2","1.0.1","1.0.2","1.0.3","1.1.0","1.1.1","1.1.2","1.1.3","1.1.4","1.2.1","1.2.2","1.3.0","1.3.1","1.3.2","1.4.0","1.4.1","1.4.2","1.4.3","1.5.0","1.6.0","1.6.1","1.7.0","1.7.1","1.8.0","1.8.1","1.9.0","1.9.1","1.9.2","2.0.0","2.0.0.pre.rc1","2.0.1","2.0.2","2.0.3","2.0.4","2.1.0","2.1.1","2.1.2","2.1.3","2.1.4"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"ruby-omniauth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.2-3","1.3.1-1","1.3.1-1+deb9u1build0.16.04.1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"ruby-omniauth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.1-1","1.3.1-2","1.6.1-2"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"ruby-omniauth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.1-1","1.9.0-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"ruby-omniauth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.9.1-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"ruby-omniauth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.1-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"ruby-omniauth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.4-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"ruby-omniauth","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.1-4","2.1.4-1"]}],"products":[{"vendor":"omniauth","product":"omniauth"}],"references":[{"url":"https://github.com/omniauth/omniauth/security/advisories/GHSA-m27g-v28p-f9fx","tags":["x_refsource_CONFIRM","advisory","web","report"]},{"url":"https://github.com/omniauth/omniauth/commit/943b44faea242f063fa9230254fe7d60cfcc9c90","tags":["x_refsource_MISC","fix","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63183","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-m27g-v28p-f9fx"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63183.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-63183","tags":["advisory"]},{"url":"https://github.com/omniauth/omniauth","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2026-63183","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63183","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-63183","title":"OmniAuth: Host Header Injection Vulnerability","description":"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.","status":"published","published":"2026-11-04T19:07:04.712Z","modified":"2026-11-05T19:20:06.749Z","cvss":[{"version":"4.0","score":6.9,"vector":"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","level":"medium","assessor":"cna"}],"cwes":["CWE-346"],"updated_at":"2026-11-05T20:54:59.423743Z"}],"euvd":[{"id":"EUVD-2026-117054","description":"OmniAuth: Host Header Injection Vulnerability","status":"published","published":"2026-11-09T21:49:04Z","modified":"2026-11-09T21:49:04Z","cvss":[{"version":"4.0","score":6.9,"vector":"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","level":"medium"}],"updated_at":"2026-11-09T23:18:32.235826Z"}],"ghsa":[{"id":"GHSA-m27g-v28p-f9fx","title":"OmniAuth: Host Header Injection Vulnerability","description":"### Impact\nHost header injection risk when using Omniauth with a web framework that does not verify incoming host headers. An example of a framework that provides host header validation is modern Rails when [configured appropriately](https://guides.rubyonrails.org/v6.1.1/configuring.html#configuring-middleware)\n\n### Patches\n2.2.0\n\n### Workarounds\n_Set the `full_host` config in the Omniauth config_","status":"published","published":"2026-11-09T21:49:04Z","modified":"2026-11-09T21:49:05Z","cvss":[{"version":"4.0","score":6.9,"vector":"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","level":"medium"}],"cwes":["CWE-346"],"updated_at":"2026-11-09T21:50:00.934325Z"}],"nvd":[{"id":"CVE-2026-63183","description":"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.","status":"published","published":"2026-11-04T19:17:40.65Z","modified":"2026-11-05T20:17:59.357Z","cvss":[{"version":"4.0","score":6.9,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-346"],"updated_at":"2026-11-05T21:56:49.714113Z"}],"osv":[{"id":"CVE-2026-63183","title":"OmniAuth: Host Header Injection Vulnerability","description":"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.","status":"published","published":"2026-11-04T19:07:04.712Z","modified":"2026-11-07T02:30:32.112567271Z","cvss":[{"version":"4.0","score":6.9,"vector":"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","level":"medium"}],"cwes":["CWE-346"],"updated_at":"2026-11-07T03:08:08.50782Z"},{"id":"DEBIAN-CVE-2026-63183","description":"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.","status":"published","published":"2026-11-04T19:17:40.65Z","modified":"2026-11-05T05:00:30.05214031Z","cvss":[{"version":"4.0","score":6.9,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"updated_at":"2026-11-05T07:10:31.343344Z"},{"id":"GHSA-m27g-v28p-f9fx","title":"OmniAuth: Host Header Injection Vulnerability","description":"### Impact\nHost header injection risk when using Omniauth with a web framework that does not verify incoming host headers. An example of a framework that provides host header validation is modern Rails when [configured appropriately](https://guides.rubyonrails.org/v6.1.1/configuring.html#configuring-middleware)\n\n### Patches\n2.2.0\n\n### Workarounds\n_Set the `full_host` config in the Omniauth config_","status":"published","published":"2026-11-09T21:49:04Z","modified":"2026-11-09T22:00:06.898354678Z","cvss":[{"version":"4.0","score":6.9,"vector":"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","level":"medium"}],"cwes":["CWE-346"],"updated_at":"2026-11-09T22:10:51.322704Z"},{"id":"UBUNTU-CVE-2026-63183","description":"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.","status":"published","published":"2026-11-05T00:00:00Z","modified":"2026-11-06T01:01:07.56589377Z","cvss":[{"version":"4.0","score":6.9,"vector":"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","level":"medium"}],"updated_at":"2026-11-06T01:32:53.964075Z"}]}}