What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-06 · updated 2026-10-13
• Weakness: CWE-287

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

• Gitea Open Source Git Server: from 1.16.0 before 1.27.2 — fixed in 1.27.2

How to fix

Upgrade to a fixed version: Gitea Open Source Git Server 1.27.2. Check the vendor advisory for mitigations.

References

• https://blog.gitea.com/release-of-1.27.2/
• https://github.com/go-gitea/gitea/pull/38805
• https://github.com/go-gitea/gitea/pull/38810
• https://github.com/go-gitea/gitea/releases/tag/v1.27.2
• https://github.com/go-gitea/gitea/security/advisories/GHSA-92j2-6qcg-c28c

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