CVE-2026-109346CWE-451

CVE-2026-109346

High · published October 12, 2026

CVSS v3.1
8.1
EPSS
0%
Percentile
19.2
In the wild
Unconfirmed
What it is

better-auth from 1.3.8-beta.3 before 1.7.0-rc.3 contains a UI misrepresentation vulnerability in the deviceAuthorization plugin because GET /device omits the requesting client_id and scope. Attackers can start a device request via /device/code, trick signed-in users into approving the code, then redeem it at /device/token for a live session token.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CVSS v4.0
8.5 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00278 · 19.2th percentile
Weakness
CWE-451 · User Interface (UI) Misrepresentation of Critical Information
Published
2026-10-12T21:17Z
References (2)
https://github.com/better-auth/better-auth/security/advisories/GHSA-q84f-53jg-9ppm · [email protected]https://www.vulncheck.com/advisories/better-auth-1.3.8-beta.3-before-1.7.0-rc.3-device-authorization-phishing-via-device · [email protected]
EPSS history
Timeline
  • 14 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 12 OCT 16:05Z
    better-auth 1.3.8-beta.3 before 1.7.0-rc.3 Device Authorization Phishing via /device
    cvelistv5
  • 12 OCT 16:05Z
    better-auth 1.3.8-beta.3 before 1.7.0-rc.3 Device Authorization Phishing via /device
    cvelistv5