Vulnerability · Published Oct 6, 2026 · Assigned by Gitea

CVE-2026-73278Gitea WebAuthn bypass during OAuth and OIDC sign-in

Critical 9.8

In plain English

A critical-severity improper authentication in Gitea from Gitea. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.5%top 59.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Gitea	Gitea	1.16.0 – through 1.27.1

Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

GitHub Security Advisory GHSA-92j2-6qcg-c28c vendor-advisory
Gitea 1.27.2 release announcement release-notes
Fix: go-gitea/gitea pull request #38805 patch
Fix: go-gitea/gitea pull request #38810 patch
go-gitea/gitea v1.27.2 release release-notes