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CVE-2026-45337

CVE-2026-45337 · Better Auth: Device authorization approve and deny accept any authenticated session while the user code is pending

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Better Auth is an authentication and authorization library for TypeScript. From 1.6.0 until 1.6.11, the deviceAuthorization plugin treats any authenticated session as the owner of any pending device code because GET /device does not claim the row and POST /device/approve and POST /device/deny short-circuit when userId is unset, allowing an authenticated attacker who learns a valid user_code to bind the polling device to the attacker's account or deny the legitimate flow. This issue is fixed in version 1.6.11.

CVSS 7.6 · High · EPSS 0.2% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • better-auth

    Versions
    • >= 1.6.0, < 1.6.11: Affected

    No fix published

  • better-auth npm

    Affected ranges
    • SEMVER: ≥ 1.6.0, < 1.6.11

    Update to 1.6.11

Original sources

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