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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-45337

33
FAUCET Score

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.

First published: Jul 15, 2026Last modified: Jul 15, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.6.0, < 1.6.11CPE matchmatch criteria
cpe:2.3:a:better-auth:better_auth:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

7.6HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
LOW
Exploitability Score
2.1
Impact Score
5.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.14%
Probability of exploitation in next 30 days
EPSS Percentile
3.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0014 is in the 1st percentile among its peer group of 890 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

npmpatch availablevia ghsa
Product: better-authFixed in: 1.6.11

Vendor Advisories (1)

npmGHSA-cq3f-vc6p-68fhhigh

Better Auth: Device authorization approve and deny accept any authenticated session while the user code is pending

Jun 4, 2026

References

github.com / better-auth/better-auth/commit/99a254a79b59d5a3f5ca2123260118cddb5beed7
Patch
github.com / better-auth/better-auth/pull/9573
Issue TrackingPatch
github.com / better-auth/better-auth/releases/tag/v1.6.11
Release Notes
github.com / better-auth/better-auth/security/advisories/GHSA-cq3f-vc6p-68fh
MitigationVendor Advisory