CVE-2026-73278CWE-287

CVE-2026-73278

Critical · published October 7, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
39.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00466 · 39.3th percentile
Weakness
CWE-287 · Improper Authentication
Published
2026-10-07T00:17Z
Affected products (1)
ProductVersionsFixed in
gitea/gitea≥ 1.16.0, < 1.27.21.27.2
References (5)
https://blog.gitea.com/release-of-1.27.2/ · 88ee5874-cf24-4952-aea0-31affedb7ff2https://github.com/go-gitea/gitea/pull/38805 · 88ee5874-cf24-4952-aea0-31affedb7ff2https://github.com/go-gitea/gitea/pull/38810 · 88ee5874-cf24-4952-aea0-31affedb7ff2https://github.com/go-gitea/gitea/releases/tag/v1.27.2 · 88ee5874-cf24-4952-aea0-31affedb7ff2https://github.com/go-gitea/gitea/security/advisories/GHSA-92j2-6qcg-c28c · 88ee5874-cf24-4952-aea0-31affedb7ff2
EPSS history
Timeline
  • 08 OCT 03:32Z
    EPSS moved — → 0%
    epss
  • 06 OCT 19:33Z
    Gitea WebAuthn bypass during OAuth and OIDC sign-in
    cvelistv5