CVE-2026-45337Better Auth is an authentication and authorization library for TypeScript.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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 (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L
- Weakness (CWE)
- CWE-285, CWE-345
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jul 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
better-auth better_auth better-auth:better_auth | from 1.6.0 before 1.6.11 | NVD |
References
- https://github.com/better-auth/better-auth/commit/99a254a79b59d5a3f5ca2123260118cddb5beed7patch
- https://github.com/better-auth/better-auth/pull/9573issue-tracking, patch
- https://github.com/better-auth/better-auth/releases/tag/v1.6.11release-notes
- https://github.com/better-auth/better-auth/security/advisories/GHSA-cq3f-vc6p-68fhmitigation, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.