What is GHSA-v9c8-wq66-wf8g?

GHSA-v9c8-wq66-wf8g is a security advisory published by GitHub Security Advisories with High severity. better-auth from 1.3.8-beta.3 before 1.7.0-rc.3 contains a UI misrepresentation vulnerability in...

Which CVE IDs does GHSA-v9c8-wq66-wf8g cover?

GHSA-v9c8-wq66-wf8g covers the following CVE IDs: CVE-2026-109346. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-v9c8-wq66-wf8g?

GHSA-v9c8-wq66-wf8g has a CVSS v3 base score of 8.1, published by GitHub Security Advisories.

GHSA-v9c8-wq66-wf8gHighCVSS 8.1

better-auth from 1.3.8-beta.3 before 1.7.0-rc.3 contains a UI misrepresentation vulnerability in...

Vendor

GitHub Security Advisories

Published

October 12, 2026

Last Modified

October 12, 2026

🔗 CVE IDs covered (1)

CVE-2026-109346 →

📋 Description

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.

🔗 References (4)

https://github.com/better-auth/better-auth/security/advisories/GHSA-q84f-53jg-9ppm
https://nvd.nist.gov/vuln/detail/CVE-2026-109346
https://www.vulncheck.com/advisories/better-auth-1.3.8-beta.3-before-1.7.0-rc.3-device-authorization-phishing-via-device
https://github.com/advisories/GHSA-v9c8-wq66-wf8g