CVE-2026-45337
HIGH
7.6
CVSS 3.1
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.
Metadata
Severity & Metrics
7.6
HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L
SSVC — CISA Coordinator
Affected products (1)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| better-auth | better-auth | — | >= 1.6.0, < 1.6.11 |
Weakness (CWE)
CVSS scores (1)
| Score | Severity | Version | Source | Vector |
|---|---|---|---|---|
| 7.6 | HIGH | 3.1 | cna | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L |
References (4)
- https://github.com/better-auth/better-auth/security/advisories/GHSA-cq3f-vc6p-68fh https://github.com/better-auth/better-auth/security/advisories/GHSA-cq3f-vc6p-68fh
- https://github.com/better-auth/better-auth/pull/9573 https://github.com/better-auth/better-auth/pull/9573
- https://github.com/better-auth/better-auth/commit/99a254a79b59d5a3f5ca2123260118cddb5beed7 https://github.com/better-auth/better-auth/commit/99a254a79b59d5a3f5ca2123260118cddb5beed7
- https://github.com/better-auth/better-auth/releases/tag/v1.6.11 https://github.com/better-auth/better-auth/releases/tag/v1.6.11