better-auth 1.3.8-beta.3 before 1.7.0-rc.3 Device Authorization Phishing via /device
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.
CVE-2026-109346
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-109346
better-auth
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "better-auth",
"product": "better-auth",
"versions": [
{
"status": "affected",
"version": "1.3.8-beta.3",
"lessThan": "1.7.0-rc.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "1.7.0-rc.3",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/better-auth",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-109346
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #17083 · Revision 1
- Added to Heist Feed
- Publisher date