by Kastro
Paper/Archive/CVE-2026-73278

CVE-2026-73278

Gitea Gitea — Gitea WebAuthn bypass during OAuth and OIDC sign-in

EPSS 0.5%CVSS 9.8
critical.is priorityof 100
38
CVSS 9.8 (ADP)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 40.3.403 × 208.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
Gitea1.16.0 – 1.27.1–CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorygithub.com/go-gitea/gitea/security/advisories/GHSA-92j2-6qcg-c28crefblog.gitea.com/release-of-1.27.2patchgithub.com/go-gitea/gitea/pull/38805patchgithub.com/go-gitea/gitea/pull/38810refgithub.com/go-gitea/gitea/releases/tag/v1.27.2