{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53515","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-09T17:30:33.456Z","datePublished":"2026-07-15T17:27:00.291Z","dateUpdated":"2026-07-15T19:30:08.165Z"},"containers":{"cna":{"title":"Better Auth: Privilege escalation via SSO provider registration: missing admin role check in @better-auth/sso","problemTypes":[{"descriptions":[{"cweId":"CWE-269","lang":"en","description":"CWE-269: Improper Privilege Management","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-285","lang":"en","description":"CWE-285: Improper Authorization","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/better-auth/better-auth/security/advisories/GHSA-gv74-j8m3-fg5f","tags":["x_refsource_CONFIRM"],"url":"https://github.com/better-auth/better-auth/security/advisories/GHSA-gv74-j8m3-fg5f"},{"name":"https://github.com/better-auth/better-auth/pull/9220","tags":["x_refsource_MISC"],"url":"https://github.com/better-auth/better-auth/pull/9220"},{"name":"https://github.com/better-auth/better-auth/commit/86765f1597378f5c3deed1b80ca91faac0a6bf00","tags":["x_refsource_MISC"],"url":"https://github.com/better-auth/better-auth/commit/86765f1597378f5c3deed1b80ca91faac0a6bf00"},{"name":"https://github.com/better-auth/better-auth/releases/tag/v1.6.11","tags":["x_refsource_MISC"],"url":"https://github.com/better-auth/better-auth/releases/tag/v1.6.11"}],"affected":[{"vendor":"better-auth","product":"better-auth","versions":[{"version":">= 1.2.10, < 1.6.11","status":"affected"}]},{"vendor":"@better-auth","product":"sso","versions":[{"version":">= 1.2.10, < 1.6.11","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-15T17:27:00.291Z"},"descriptions":[{"lang":"en","value":"Better Auth is an authentication and authorization library for TypeScript. From 1.2.10 until 1.6.11, the @better-auth/sso plugin's POST /sso/register endpoint lets any organization member attach a new SSO provider to that organization because registerSSOProvider checks only for a membership row and does not require an owner or admin role, allowing attacker-controlled OIDC or SAML providers to drive /sso/callback/{providerId} organization provisioning. This issue is fixed in version 1.6.11."}],"source":{"advisory":"GHSA-gv74-j8m3-fg5f","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-15T19:29:56.598355Z","id":"CVE-2026-53515","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-15T19:30:08.165Z"}}]}}