AIKIDO-2026-11110
@better-auth/passkey is vulnerable to Incorrect Authorization
71
High Risk
This Affects:
@better-auth/passkeyTL;DR
The passkey plugin verifies WebAuthn registration and authentication using a stored challenge row. Before the fix, two concurrent verify requests sharing the same signed challenge cookie could both consume the challenge and succeed, allowing replayed passkey verification to register credentials or mint sessions. The fix atomically consumes challenge rows through consumeVerificationValue so only the first caller succeeds.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
@better-auth/passkey is vulnerable to Incorrect Authorization in versions 1.6.0 - 1.6.11.
How to fix this
Upgrade the @better-auth/passkey library to the patch version.
Are You Affected?
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SOC 2Compliant
ISO 27001Compliant