CVE-2026-110862
CVE-2026-110862 · Better Auth 1.4.0-beta.18 before 1.7.7 Authentication Bypass via Magic Link
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Better Auth from 1.4.0-beta.18 before 1.7.7 contains an authentication bypass vulnerability that allows unauthenticated attackers to sign in as other users by reusing OAuth state values as Magic Link tokens. Attackers can start an OAuth sign-in with a victim's email and submit the returned state to Magic Link verification, gaining sessions or creating falsely email-verified accounts.
CVSS 9.3 · Critical · EPSS 0.3% · Fix available
- Published
- Updated
Affected products and versions
better-auth
- Versions
- ≥ 1.4.0-beta.18, < 1.7.7: Affected (semver)
- 1.7.7: Not affected (semver)
Update to 1.7.7