{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63183","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-07-15T22:13:00.721Z","datePublished":"2026-11-04T19:07:04.712Z","dateUpdated":"2026-11-05T19:20:06.749Z"},"containers":{"cna":{"title":"OmniAuth: Host Header Injection Vulnerability","problemTypes":[{"descriptions":[{"cweId":"CWE-346","lang":"en","description":"CWE-346: Origin Validation Error","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"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","version":"4.0"}}],"references":[{"name":"https://github.com/omniauth/omniauth/security/advisories/GHSA-m27g-v28p-f9fx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/omniauth/omniauth/security/advisories/GHSA-m27g-v28p-f9fx"},{"name":"https://github.com/omniauth/omniauth/commit/943b44faea242f063fa9230254fe7d60cfcc9c90","tags":["x_refsource_MISC"],"url":"https://github.com/omniauth/omniauth/commit/943b44faea242f063fa9230254fe7d60cfcc9c90"}],"affected":[{"vendor":"omniauth","product":"omniauth","versions":[{"version":"< 2.2.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-11-04T19:07:04.712Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-m27g-v28p-f9fx","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-11-05T19:19:56.610534Z","id":"CVE-2026-63183","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-11-05T19:20:06.749Z"}}]}}