Vulnerability Intelligence Report
Gitea WebAuthn bypass during OAuth and OIDC sign-in
CVE-2026-73278
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.
Authentication Bypass
No Active Exploit Signals
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:0.17%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-287 ↗CWE-287: Improper Authentication
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Gitea | Gitea | 1.16.0 <= 1.27.1 (affected) |
Threat Intelligence Signals
EPSS Score
0.173%
Vulnerability Class
Authentication Bypass
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Gitea Limited · Open Source · China |
| Reserved | 2026-08-13T16:50:59 |
| Published | 2026-10-06T19:33:54 |
| Last Updated | 2026-10-07T20:00:46 |
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