Gitea WebAuthn bypass during OAuth and OIDC sign-in
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.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-73278US | — | — | ||
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 throu… | ||||
references
External citations — patches, advisories, analysis.
- https://blog.gitea.com/release-of-1.27.2/ARTICLE
- https://github.com/go-gitea/gitea/pull/38805FIX
- https://github.com/go-gitea/gitea/pull/38810FIX
- https://github.com/go-gitea/gitea/releases/tag/v1.27.2ARTICLE
- https://github.com/go-gitea/gitea/security/advisories/GHSA-92j2-6qcg-c28cADVISORY
- https://nvd.nist.gov/vuln/detail/CVE-2026-73278WEB
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