CVE-2026-73278 Gitea - Authentication Bypass

Gitea contains a broken authentication vulnerability caused by missing WebAuthn challenge enforcement in OAuth2 and OpenID Connect sign-in paths when WebAuthn is the only second factor, letting attackers obtain full sessions without passkey verification, exploit requires authentication via external identity flow.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.47% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
6 October 2026
Updated
15 October 2026
Weakness
CWE-287

Vendor fix

Update to the latest version with enforced WebAuthn challenge in external identity flows.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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