{"id":"CVE-2026-53515","summary":"Better Auth: Privilege escalation via SSO provider registration: missing admin role check in @better-auth/sso","details":"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.","aliases":["GHSA-gv74-j8m3-fg5f"],"modified":"2026-07-16T03:48:41.944600669Z","published":"2026-07-15T17:27:00.291Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53515.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-269","CWE-285","CWE-863"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53515.json"},{"type":"FIX","url":"https://github.com/better-auth/better-auth/commit/86765f1597378f5c3deed1b80ca91faac0a6bf00"},{"type":"FIX","url":"https://github.com/better-auth/better-auth/pull/9220"},{"type":"WEB","url":"https://github.com/better-auth/better-auth/releases/tag/v1.6.11"},{"type":"ADVISORY","url":"https://github.com/better-auth/better-auth/security/advisories/GHSA-gv74-j8m3-fg5f"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53515"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/better-auth/better-auth","events":[{"introduced":"08d92952ab827d6201fe756f4c8d4d921471c0d9"},{"fixed":"f41514ef07cfafc5dbf463bd1500aee6575d88a7"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"1.2.10"},{"fixed":"1.6.11"}]}}],"versions":["v1.6.10","better-auth@1.6.10","auth@1.6.10","@better-auth/test-utils@1.6.10","@better-auth/telemetry@1.6.10","@better-auth/stripe@1.6.10","@better-auth/sso@1.6.10","@better-auth/scim@1.6.10","@better-auth/redis-storage@1.6.10","@better-auth/prisma-adapter@1.6.10","@better-auth/passkey@1.6.10","@better-auth/oauth-provider@1.6.10","@better-auth/mongo-adapter@1.6.10","@better-auth/memory-adapter@1.6.10","@better-auth/kysely-adapter@1.6.10","@better-auth/i18n@1.6.10","@better-auth/expo@1.6.10","@better-auth/electron@1.6.10","@better-auth/drizzle-adapter@1.6.10","@better-auth/core@1.6.10","@better-auth/api-key@1.6.10","v1.6.9","better-auth@1.6.9","auth@1.6.9","@better-auth/test-utils@1.6.9","@better-auth/telemetry@1.6.9","@better-auth/stripe@1.6.9","@better-auth/sso@1.6.9","@better-auth/scim@1.6.9","@better-auth/redis-storage@1.6.9","@better-auth/prisma-adapter@1.6.9","@better-auth/passkey@1.6.9","@better-auth/oauth-provider@1.6.9","@better-auth/mongo-adapter@1.6.9","@better-auth/memory-adapter@1.6.9","@better-auth/kysely-adapter@1.6.9","@better-auth/i18n@1.6.9","@better-auth/expo@1.6.9","@better-auth/electron@1.6.9","@better-auth/drizzle-adapter@1.6.9","@better-auth/core@1.6.9","@better-auth/api-key@1.6.9","v1.6.8","better-auth@1.6.8","auth@1.6.8","@better-auth/test-utils@1.6.8","@better-auth/telemetry@1.6.8","@better-auth/stripe@1.6.8","@better-auth/sso@1.6.8","@better-auth/scim@1.6.8","@better-auth/redis-storage@1.6.8","@better-auth/prisma-adapter@1.6.8","@better-auth/passkey@1.6.8","@better-auth/oauth-provider@1.6.8","@better-auth/mongo-adapter@1.6.8","@better-auth/memory-adapter@1.6.8","@better-auth/kysely-adapter@1.6.8","@better-auth/i18n@1.6.8","@better-auth/expo@1.6.8","@better-auth/electron@1.6.8","@better-auth/drizzle-adapter@1.6.8","@better-auth/core@1.6.8","@better-auth/api-key@1.6.8","v1.6.7","better-auth@1.6.7","auth@1.6.7","@better-auth/test-utils@1.6.7","@better-auth/telemetry@1.6.7","@better-auth/stripe@1.6.7","@better-auth/sso@1.6.7","@better-auth/scim@1.6.7","@better-auth/redis-storage@1.6.7","@better-auth/prisma-adapter@1.6.7","@better-auth/passkey@1.6.7","@better-auth/oauth-provider@1.6.7","@better-auth/mongo-adapter@1.6.7","@better-auth/memory-adapter@1.6.7","@better-auth/kysely-adapter@1.6.7","@better-auth/i18n@1.6.7","@better-auth/expo@1.6.7","@better-auth/electron@1.6.7","@better-auth/drizzle-adapter@1.6.7","@better-auth/core@1.6.7","@better-auth/api-key@1.6.7","v1.6.6","better-auth@1.6.6","auth@1.6.6","@better-auth/test-utils@1.6.6","@better-auth/telemetry@1.6.6","@better-auth/stripe@1.6.6","@better-auth/sso@1.6.6","@better-auth/scim@1.6.6","@better-auth/redis-storage@1.6.6","@better-auth/prisma-adapter@1.6.6","@better-auth/passkey@1.6.6","@better-auth/oauth-provider@1.6.6","@better-auth/mongo-adapter@1.6.6","@better-auth/memory-adapter@1.6.6","@better-auth/kysely-adapter@1.6.6","@better-auth/i18n@1.6.6","@better-auth/expo@1.6.6","@better-auth/electron@1.6.6","@better-auth/drizzle-adapter@1.6.6","@better-auth/core@1.6.6","@better-auth/api-key@1.6.6","v1.6.5","better-auth@1.6.5","auth@1.6.5","@better-auth/test-utils@1.6.5","@better-auth/telemetry@1.6.5","@better-auth/stripe@1.6.5","@better-auth/sso@1.6.5","@better-auth/scim@1.6.5","@better-auth/redis-storage@1.6.5","@better-auth/prisma-adapter@1.6.5","@better-auth/passkey@1.6.5","@better-auth/oauth-provider@1.6.5","@better-auth/mongo-adapter@1.6.5","@better-auth/memory-adapter@1.6.5","@better-auth/kysely-adapter@1.6.5","@better-auth/i18n@1.6.5","@better-auth/expo@1.6.5","@better-auth/electron@1.6.5","@better-auth/drizzle-adapter@1.6.5","@better-auth/core@1.6.5","@better-auth/api-key@1.6.5","v1.6.4","better-auth@1.6.4","auth@1.6.4","@better-auth/test-utils@1.6.4","@better-auth/telemetry@1.6.4","@better-auth/stripe@1.6.4","@better-auth/sso@1.6.4","@better-auth/scim@1.6.4","@better-auth/redis-storage@1.6.4","@better-auth/prisma-adapter@1.6.4","@better-auth/passkey@1.6.4","@better-auth/oauth-provider@1.6.4","@better-auth/mongo-adapter@1.6.4","@better-auth/memory-adapter@1.6.4","@better-auth/kysely-adapter@1.6.4","@better-auth/i18n@1.6.4","@better-auth/expo@1.6.4","@better-auth/electron@1.6.4","@better-auth/drizzle-adapter@1.6.4","@better-auth/core@1.6.4","@better-auth/api-key@1.6.4","v1.6.3","better-auth@1.6.3","auth@1.6.3","@better-auth/test-utils@1.6.3","@better-auth/telemetry@1.6.3","@better-auth/stripe@1.6.3","@better-auth/sso@1.6.3","@better-auth/scim@1.6.3","@better-auth/redis-storage@1.6.3","@better-auth/prisma-adapter@1.6.3","@better-auth/passkey@1.6.3","@better-auth/oauth-provider@1.6.3","@better-auth/mongo-adapter@1.6.3","@better-auth/memory-adapter@1.6.3","@better-auth/kysely-adapter@1.6.3","@better-auth/i18n@1.6.3","@better-auth/expo@1.6.3","@better-auth/electron@1.6.3","@better-auth/drizzle-adapter@1.6.3","@better-auth/core@1.6.3","@better-auth/api-key@1.6.3","v1.6.2","better-auth@1.6.2","auth@1.6.2","@better-auth/test-utils@1.6.2","@better-auth/telemetry@1.6.2","@better-auth/stripe@1.6.2","@better-auth/sso@1.6.2","@better-auth/scim@1.6.2","@better-auth/redis-storage@1.6.2","@better-auth/prisma-adapter@1.6.2","@better-auth/passkey@1.6.2","@better-auth/oauth-provider@1.6.2","@better-auth/mongo-adapter@1.6.2","@better-auth/memory-adapter@1.6.2","@better-auth/kysely-adapter@1.6.2","@better-auth/i18n@1.6.2","@better-auth/expo@1.6.2","@better-auth/electron@1.6.2","@better-auth/drizzle-adapter@1.6.2","@better-auth/core@1.6.2","@better-auth/api-key@1.6.2","v1.6.1","better-auth@1.6.1","auth@1.6.1","@better-auth/test-utils@1.6.1","@better-auth/telemetry@1.6.1","@better-auth/stripe@1.6.1","@better-auth/sso@1.6.1","@better-auth/scim@1.6.1","@better-auth/redis-storage@1.6.1","@better-auth/prisma-adapter@1.6.1","@better-auth/passkey@1.6.1","@better-auth/oauth-provider@1.6.1","@better-auth/mongo-adapter@1.6.1","@better-auth/memory-adapter@1.6.1","@better-auth/kysely-adapter@1.6.1","@better-auth/i18n@1.6.1","@better-auth/expo@1.6.1","@better-auth/electron@1.6.1","@better-auth/drizzle-adapter@1.6.1","@better-auth/core@1.6.1","@better-auth/api-key@1.6.1","v1.6.0","better-auth@1.6.0","auth@1.6.0","@better-auth/test-utils@1.6.0","@better-auth/telemetry@1.6.0","@better-auth/stripe@1.6.0","@better-auth/sso@1.6.0","@better-auth/scim@1.6.0","@better-auth/redis-storage@1.6.0","@better-auth/prisma-adapter@1.6.0","@better-auth/passkey@1.6.0","@better-auth/oauth-provider@1.6.0","@better-auth/mongo-adapter@1.6.0","@better-auth/memory-adapter@1.6.0","@better-auth/kysely-adapter@1.6.0","@better-auth/i18n@1.6.0","@better-auth/expo@1.6.0","@better-auth/electron@1.6.0","@better-auth/drizzle-adapter@1.6.0","@better-auth/core@1.6.0","@better-auth/api-key@1.6.0","v1.5.7-beta.1","v1.5.1-beta.4","v1.5.1-beta.3","v1.5.1-beta.2","v1.5.1-beta.1","v1.5.0-beta.20","v1.5.0-beta.19","v1.5.0-beta.18","v1.5.0-beta.17","v1.5.0-beta.16","v1.5.0-beta.15","v1.5.0-beta.14","v1.5.0-beta.13","v1.5.0-beta.12","v1.5.0-beta.11","v1.5.0-beta.10","v1.5.0-beta.9","v1.5.0-beta.8","v1.5.0-beta.7","v1.5.0-beta.6","v1.5.0-beta.5","v1.5.0-beta.4","v1.5.0-beta.3","v1.5.0-beta.2","v1.5.0-beta.1","v1.4.8-beta.7","v1.4.8-beta.6","v1.4.8-beta.5","v1.4.8-beta.4","v1.4.8-beta.3","v1.4.8-beta.2","v1.4.8-beta.1","v1.4.7-beta.4","v1.4.7-beta.3","v1.4.7-beta.2","v1.4.7-beta.1","v1.4.6-beta.3","v1.4.6-beta.2","v1.4.6-beta.1","v1.4.5-beta.2","v1.4.5-beta.1","v1.4.4-beta.3","v1.4.4-beta.1","v1.4.2-beta.5","v1.4.2-beta.4","v1.4.2-beta.3","v1.4.2-beta.2","v1.4.1-beta.1","v1.4.0-beta.27","v1.4.0-beta.26","v1.4.0-beta.25","v1.4.0-beta.24","v1.4.0-beta.23","v1.4.0-beta.22","v1.4.0-beta.21","v1.4.0-beta.20","v1.4.0-beta.19","v1.4.0-beta.18","v1.4.0-beta.17","v1.4.0-beta.16","v1.4.0-beta.15","v1.4.0-beta.14","v1.4.0-beta.13","v1.4.0-beta.12","v1.4.0-beta.11","v1.4.0-beta.10","v1.4.0-beta.9","v1.4.0-beta.8","v1.4.0-beta.7","v1.4.0-beta.6","v1.4.0-beta.5","v1.4.0-beta.4","v1.4.0-beta.3","v1.4.0-beta.2","v1.4.0-beta.1","v1.3.11","v1.3.10","v1.3.9","v1.3.8","v1.3.8-beta.1","v1.3.7-beta.3","v1.3.7-beta.2","v1.3.6","v1.3.5-beta.7","v1.3.5-beta.6","v1.3.5-beta.5","v1.3.5-beta.4","v1.3.5-beta.3","v1.3.5-beta.2","v1.3.5-beta.1","better-auth@1.3.4","@better-auth/stripe@1.3.4","@better-auth/sso@1.3.4","@better-auth/expo@1.3.4","@better-auth/cli@1.3.4","v1.3.3","v1.3.2","v1.3.1","v1.3.1-beta.1","v1.3.0","v1.3.0-beta.11","v1.3.0-beta.10","v1.2.12","v1.2.11","v1.2.10"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53515.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N"}]}