CVE-2026-45337

HighCVSS 7.6/10Last modified Jul 21, 2026

Description

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.

Metrics

CVSS 3.1 7.6/10CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L

Weakness enumeration

CWE-285 CWE-345

Affected software

No affected versions have been published.

Timeline

Published: Jul 15, 2026
Last modified: Jul 21, 2026
NVD status: Analyzed

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