CVE-2026-73278
Gitea WebAuthn bypass during OAuth and OIDC sign-in
- State
- Published
- Severity
- 9.8 Critical
- Published
- Oct 6, 2026
- Updated
- Oct 7, 2026
- Reserved
- Aug 13, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
Weaknesses
- CWE-287 Improper Authentication
Affected Products
| Product | Versions |
|---|---|
GiteaGitea |
|
References
- GitHub Security Advisory GHSA-92j2-6qcg-c28cvendor-advisory
- Gitea 1.27.2 release announcementrelease-notes
- Fix: go-gitea/gitea pull request #38805patch
- Fix: go-gitea/gitea pull request #38810patch
- go-gitea/gitea v1.27.2 releaserelease-notes
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