Is CVE-2026-109346 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-109346?

CVE-2026-109346 has a CVSS v3 severity of HIGH (8.1).

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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.