{"id":"CVE-2026-73278","state":"PUBLISHED","title":"Gitea WebAuthn bypass during OAuth and OIDC sign-in","description":"Gitea's OAuth2 and OpenID Connect sign-in paths do not require a WebAuthn challenge when WebAuthn is the account's only configured second factor. A party able to authenticate through the affected external identity flow can obtain a full session without the passkey verification enforced during password login. One affected path can also persist an external identity link, extending the compromise beyond the initial session; accounts with TOTP configured are outside the reported WebAuthn-only scenario.","publishedAt":"2026-10-06T19:33:54.375Z","updatedAt":"2026-10-07T20:00:46.107Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"Gitea","products":["Gitea Gitea"],"affected":[{"vendor":"Gitea","product":"Gitea","packageName":"gitea.dev","defaultStatus":"unaffected","versions":[{"version":"1.16.0","status":"affected","lessThanOrEqual":"1.27.1","versionType":"semver"}]}],"references":["https://github.com/go-gitea/gitea/security/advisories/GHSA-92j2-6qcg-c28c","https://blog.gitea.com/release-of-1.27.2/","https://github.com/go-gitea/gitea/pull/38805","https://github.com/go-gitea/gitea/pull/38810","https://github.com/go-gitea/gitea/releases/tag/v1.27.2"],"weaknesses":["CWE-287"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/73xxx/CVE-2026-73278.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-73278","state":"PUBLISHED","datePublished":"2026-10-06T19:33:54.375Z","dateUpdated":"2026-10-07T20:00:46.107Z","assignerShortName":"Gitea","assignerOrgId":"88ee5874-cf24-4952-aea0-31affedb7ff2","dateReserved":"2026-08-13T16:50:59.760Z"},"containers":{"cna":{"title":"Gitea WebAuthn bypass during OAuth and OIDC sign-in","descriptions":[{"lang":"en","value":"Gitea's OAuth2 and OpenID Connect sign-in paths do not require a WebAuthn challenge when WebAuthn is the account's only configured second factor. A party able to authenticate through the affected external identity flow can obtain a full session without the passkey verification enforced during password login. One affected path can also persist an external identity link, extending the compromise beyond the initial session; accounts with TOTP configured are outside the reported WebAuthn-only scenario."}],"affected":[{"vendor":"Gitea","product":"Gitea","packageName":"gitea.dev","defaultStatus":"unaffected","versions":[{"version":"1.16.0","status":"affected","lessThanOrEqual":"1.27.1","versionType":"semver"}]}],"references":[{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-92j2-6qcg-c28c","name":"GitHub Security Advisory GHSA-92j2-6qcg-c28c","tags":["vendor-advisory"]},{"url":"https://blog.gitea.com/release-of-1.27.2/","name":"Gitea 1.27.2 release announcement","tags":["release-notes"]},{"url":"https://github.com/go-gitea/gitea/pull/38805","name":"Fix: go-gitea/gitea pull request #38805","tags":["patch"]},{"url":"https://github.com/go-gitea/gitea/pull/38810","name":"Fix: go-gitea/gitea pull request #38810","tags":["patch"]},{"url":"https://github.com/go-gitea/gitea/releases/tag/v1.27.2","name":"go-gitea/gitea v1.27.2 release","tags":["release-notes"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-287","lang":"en","type":"CWE","description":"CWE-287: Improper Authentication"}]}],"providerMetadata":{"shortName":"Gitea","orgId":"88ee5874-cf24-4952-aea0-31affedb7ff2","dateUpdated":"2026-10-06T19:33:54.375Z"},"credits":[{"lang":"en","value":"https://github.com/MindflareX","type":"reporter"},{"lang":"en","value":"https://github.com/AdamKorcz","type":"reporter"},{"lang":"en","value":"https://github.com/jaeyoon-kim-dev","type":"reporter"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.8,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-10-07T20:00:20.177733Z","id":"CVE-2026-73278","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-07T20:00:46.107Z"}}]}}}