{"schema":"threatline.record/2","record":{"id":"CVE-2026-109346","aliases":["GHSA-q84f-53jg-9ppm"],"summary":"better-auth 1.3.8-beta.3 before 1.7.0-rc.3 Device Authorization Phishing via /device","details":"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.","categories":["Unclassified"],"product":"better-auth","vendor":"better-auth","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-109346","source_modified_at":"2026-10-12T16:05:30.595Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"better-auth","vendor":"better-auth","versions":[{"version":"1.3.8-beta.3","status":"affected","versionType":"semver","lessThan":"1.7.0-rc.3"},{"version":"1.7.0-rc.3","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-109346","source_modified_at":"2026-10-12T16:05:30.595Z","fetched_at":"2026-10-23T18:48:36.087640Z","package":{"name":"better-auth","ecosystem":null},"version":"1.7.0-rc.3","basis":"first unaffected version stated in the CVE record"}],"cvss":8.5,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00278,"percentile":0.19228,"score_date":"2026-10-23"},"published_at":"2026-10-12T16:05:30.595Z","modified_at":"2026-10-12T16:05:30.595Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-109346","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-12T16:05:30.595Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-109346","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/better-auth/better-auth/security/advisories/GHSA-q84f-53jg-9ppm","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/better-auth-1.3.8-beta.3-before-1.7.0-rc.3-device-authorization-phishing-via-device","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-12T16:05:30.595Z","content_hash":"e37fbadb575393cc19f377620d80e6b57ab6fe150189975a73c8e2a191bc693d"}}