{"id":"CVE-2026-73535","state":"PUBLISHED","title":"Gitea second-factor bypass through OpenID identity linking","description":"Gitea's OpenID connect handler accepts a user's password without enforcing enrolled TOTP or WebAuthn verification before completing sign-in and linking an OpenID identifier. When OpenID sign-in is enabled, an attacker who knows the victim's password can obtain a session and link an attacker-controlled identifier. The attacker can then sign in through that identifier without the victim's password or second factor, and a password change does not remove the link.","publishedAt":"2026-10-14T14:37:39.073Z","updatedAt":"2026-10-18T13:32:08.609Z","severity":{"score":8.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"Gitea","products":["Gitea Gitea"],"affected":[{"vendor":"Gitea","product":"Gitea","packageName":"gitea.dev","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.27.1","versionType":"semver"}]}],"references":["https://github.com/go-gitea/gitea/security/advisories/GHSA-8xjr-x7rg-hp5h","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"],"weaknesses":["CWE-304","CWE-696"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/73xxx/CVE-2026-73535.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-73535","state":"PUBLISHED","datePublished":"2026-10-14T14:37:39.073Z","dateUpdated":"2026-10-18T13:32:08.609Z","assignerShortName":"Gitea","assignerOrgId":"88ee5874-cf24-4952-aea0-31affedb7ff2","dateReserved":"2026-08-13T16:50:58.701Z"},"containers":{"cna":{"title":"Gitea second-factor bypass through OpenID identity linking","descriptions":[{"lang":"en","value":"Gitea's OpenID connect handler accepts a user's password without enforcing enrolled TOTP or WebAuthn verification before completing sign-in and linking an OpenID identifier. When OpenID sign-in is enabled, an attacker who knows the victim's password can obtain a session and link an attacker-controlled identifier. The attacker can then sign in through that identifier without the victim's password or second factor, and a password change does not remove the link."}],"affected":[{"vendor":"Gitea","product":"Gitea","packageName":"gitea.dev","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.27.1","versionType":"semver"}]}],"references":[{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-8xjr-x7rg-hp5h","name":"GitHub Security Advisory GHSA-8xjr-x7rg-hp5h","tags":["vendor-advisory"]},{"url":"https://blog.gitea.com/release-of-1.27.2/","name":"Gitea 1.27.2 release announcement","tags":["release-notes"]},{"url":"https://github.com/go-gitea/gitea/pull/38805","name":"Fix: go-gitea/gitea pull request #38805","tags":["patch"]},{"url":"https://github.com/go-gitea/gitea/pull/38810","name":"Fix: go-gitea/gitea pull request #38810","tags":["patch"]},{"url":"https://github.com/go-gitea/gitea/releases/tag/v1.27.2","name":"go-gitea/gitea v1.27.2 release","tags":["release-notes"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-304","lang":"en","type":"CWE","description":"CWE-304: Missing Critical Step in Authentication"},{"cweId":"CWE-696","lang":"en","type":"CWE","description":"CWE-696: Incorrect Behavior Order"}]}],"providerMetadata":{"shortName":"Gitea","orgId":"88ee5874-cf24-4952-aea0-31affedb7ff2","dateUpdated":"2026-10-14T14:37:39.073Z"},"credits":[{"lang":"en","value":"https://github.com/r0hanSH","type":"reporter"},{"lang":"en","value":"https://github.com/cyberlanc3r","type":"reporter"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":8.8,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-10-18T13:31:49.410645Z","id":"CVE-2026-73535","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-18T13:32:08.609Z"}}]}}}