CVE-2026-110864GHSA-R4XP-PRCW-77QF
Better Auth 1.5.0-beta.12 before 1.7.7 Authentication Bypass via OAuth Proxy
- Published
- Last modified
- Status
- published
- Known exploitation
- Not listed in CISA KEV
- Fix
- Fixed in 1.7.7
- Public exploit
- None on Exploit-DB
CISA SSVC
- Exploitation: none
- Automatable: no
- Technical impact: total
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Decision points from CISA's Vulnrichment, assessed (SSVC 2.0.3).
SSVC documentationSummary
Better Auth from 1.5.0-beta.12 before 1.7.7 contains an authentication bypass vulnerability in the OAuth Proxy plugin that allows unauthenticated attackers to sign in as other users by forging encrypted profiles. When the proxy shares the global secret and cookie-stored state is used, attackers can obtain encrypted state for a fake profile with a victim's verified email to take over the account via implicit linking.
Affected versions
- better-auth better-auth
From 1.5.0-beta.12 · fixed in 1.7.7