CVE-2026-104627 (GCVE-0-2026-104627)
Vulnerability from cvelistv5
Published
2026-10-18 18:51
Modified
2026-10-19 20:20
Severity ?
5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
CWE
  • CWE-287 - Improper Authentication
  • CWE-352 - Cross-Site Request Forgery (CSRF)
Summary
The Gitea OpenID association callback in the security settings accepted a positive OpenID 2.0 assertion without checking that the signed-in user had started the linking. Because OpenID 2.0 allows unsolicited assertions, an attacker-controlled OpenID provider could attach the attacker's identity to the account of a signed-in victim who opened a crafted link, and the attacker could then sign in as the victim through OpenID login, which does not apply the local TOTP or WebAuthn checks. The callback now requires a time-limited `state` value bound to the user.
References
Impacted products
Vendor Product Version
Gitea Gitea Version: 0   ≤ 28.1.0
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          "url": "https://github.com/go-gitea/gitea/releases/tag/v28.2.0"
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