{"id":"CVE-2026-73278","title":"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","summary":"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 …","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-287"],"vendor":"gitea","product":"gitea","affected":["gitea >= 1.16.0, < 1.27.2"],"patched":["gitea 1.27.2"],"published":"2026-10-06","updated":"2026-10-13","sourceUpdated":"2026-10-13T16:53:31.257","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73278","references":[{"url":"https://blog.gitea.com/release-of-1.27.2/","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/pull/38805","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/pull/38810","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/releases/tag/v1.27.2","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-92j2-6qcg-c28c","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"}],"tags":["nvd","cve.org"],"epss":0.00466,"epssPercentile":0.40139,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-07T20:00:20.177733Z"},"ingestedAt":"2026-10-06T20:16:42.489Z","slug":"CVE-2026-73278","body":"## Overview\n\nGitea'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.\n\n## Affected\n\n- `gitea >= 1.16.0, < 1.27.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `gitea 1.27.2`","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":217772,"id":"CVE-2026-73278","ts":1791406442353,"field":"cvss","old":null,"new":"9.8"},{"seq":217771,"id":"CVE-2026-73278","ts":1791406442353,"field":"severity","old":"none","new":"critical"}]}