{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-109346", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-10-12T14:19:01.653Z", "datePublished": "2026-10-12T16:05:30.595Z", "dateUpdated": "2026-10-12T16:05:30.595Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-10-12T16:05:30.595Z" }, "datePublic": "2026-09-28T00:00:00.000Z", "title": "better-auth 1.3.8-beta.3 before 1.7.0-rc.3 Device Authorization Phishing via /device", "descriptions": [ { "lang": "en", "value": "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." } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "description": "User Interface (UI) Misrepresentation of Critical Information", "cweId": "CWE-451", "type": "CWE" } ] } ], "affected": [ { "vendor": "better-auth", "product": "better-auth", "defaultStatus": "unaffected", "packageURL": "pkg:npm/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" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:better-auth:better_auth:*:*:*:*:*:*:*:*", "versionStartIncluding": "1.3.8-beta.3", "versionEndExcluding": "1.7.0-rc.3" } ] } ] } ], "metrics": [ { "format": "CVSS", "cvssV4_0": { "version": "4.0", "vectorString": "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", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.5, "baseSeverity": "HIGH" } }, { "format": "CVSS", "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE", "baseScore": 8.1, "baseSeverity": "HIGH" } } ], "references": [ { "url": "https://github.com/better-auth/better-auth/security/advisories/GHSA-q84f-53jg-9ppm", "tags": [ "vendor-advisory" ], "name": "GitHub Security Advisory (GHSA-q84f-53jg-9ppm)" }, { "name": "VulnCheck Advisory: better-auth 1.3.8-beta.3 before 1.7.0-rc.3 Device Authorization Phishing via /device", "tags": [ "third-party-advisory" ], "url": "https://www.vulncheck.com/advisories/better-auth-1.3.8-beta.3-before-1.7.0-rc.3-device-authorization-phishing-via-device" } ], "credits": [ { "lang": "en", "value": "XlabAITeam", "type": "reporter" }, { "lang": "en", "value": "liangjs", "type": "reporter" } ], "x_generator": { "engine": "vulncheck-endgame" } } } }