GHSA-47gc-4jpf-3mgvHighCVSS 8.1
Better Auth @better-auth/sso from 1.7.0-rc.2 before 1.7.3 contains an authentication bypass...
🔗 CVE IDs covered (1)
📋 Description
Better Auth @better-auth/sso from 1.7.0-rc.2 before 1.7.3 contains an authentication bypass vulnerability that allows authenticated users to sign in as other users by registering a personal SSO provider. Attackers can copy a legitimate provider's OIDC issuer or SAML entity ID and assert a victim's subject or NameID, because account lookup ignores providerId, creating sessions for victim accounts.
🔗 References (4)
- https://github.com/better-auth/better-auth/security/advisories/GHSA-mx9r-x6ww-qjw9
- https://nvd.nist.gov/vuln/detail/CVE-2026-110863
- https://www.vulncheck.com/advisories/better-auth-better-auth-sso-before-1.7.3-authentication-bypass-via-personal-sso-providers
- https://github.com/advisories/GHSA-47gc-4jpf-3mgv