CVE-2026-110862 (GCVE-0-2026-110862)
Vulnerability from cvelistv5
Published
2026-10-14 22:52
Modified
2026-10-15 13:34
Severity ?
9.3 (Critical) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE
  • CWE-287 - Improper Authentication
Summary
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.
References
Impacted products
Vendor Product Version
better-auth better-auth Version: 1.4.0-beta.18   ≤
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