Critical severity · published Oct 6, 2026
CVE-2026-73278
Gitea WebAuthn bypass during OAuth and OIDC sign-in
9.8
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GI
Gitea · Gitea
1.16.0 through 1.27.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-73278
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-73278
vendor-advisory
https://github.com/go-gitea/gitea/security/advisories/GHSA-92j2-6qcg-c28c
release-notes
https://blog.gitea.com/release-of-1.27.2/
patch
https://github.com/go-gitea/gitea/pull/38805
patch
https://github.com/go-gitea/gitea/pull/38810
release-notes
https://github.com/go-gitea/gitea/releases/tag/v1.27.2
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