{"id":"CVE-2026-104627","title":"Gitea OpenID account linking without session binding","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-contr…","severity":"none","cwe":["CWE-287","CWE-352"],"vendor":"Gitea","product":"gitea.dev","affected":["gitea.dev <= 28.1.0"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T18:51:06.543Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-104627","references":[{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-mf69-7pqq-86vx","label":"GitHub Security Advisory GHSA-mf69-7pqq-86vx"},{"url":"https://github.com/go-gitea/gitea/pull/39642","label":"Fix: go-gitea/gitea pull request #39642"},{"url":"https://github.com/go-gitea/gitea/pull/39744","label":"Fix backport to release/v28: go-gitea/gitea pull request #39744"},{"url":"https://blog.gitea.com/release-of-28.2.0/","label":"Gitea 28.2.0 release announcement"},{"url":"https://github.com/go-gitea/gitea/releases/tag/v28.2.0","label":"go-gitea/gitea v28.2.0 release"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T19:51:12.339Z","slug":"CVE-2026-104627","body":"## Overview\n\nThe 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.\n\n## Affected\n\n- `gitea.dev <= 28.1.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}