{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-121802", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "state": "PUBLISHED", "assignerShortName": "mitre", "dateReserved": "2026-11-04T02:36:12.694Z", "datePublished": "2026-11-04T02:36:13.640Z", "dateUpdated": "2026-11-04T02:44:07.935Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "packageURL": "pkg:npm/%40better-auth/expo", "product": "Better Auth", "vendor": "better-auth", "versions": [{"lessThan": "1.7.16", "status": "affected", "version": "0", "versionType": "semver"}]}], "descriptions": [{"lang": "en", "value": "@better-auth/expo before 1.7.16 allows certain account-takeover outcomes (e.g., unauthenticated changes of any account's email address), because it signs a caller-supplied state value without checking whether that value had been issued by the server. NOTE: the application secret must be rotated after updating to a fixed version."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-346", "description": "CWE-346 Origin Validation Error", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-11-04T02:44:07.935Z"}, "references": [{"url": "https://github.com/better-auth/better-auth/security/advisories/GHSA-4wq4-2ppv-q3hg"}, {"url": "https://github.com/better-auth/better-auth/blob/main/packages/expo/CHANGELOG.md"}, {"url": "https://github.com/better-auth/better-auth/releases/tag/v1.7.16"}], "x_generator": {"engine": "CVE-Request-form 0.0.1"}, "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:better-auth:better_auth:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.7.16"}]}]}]}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageURL": "pkg:npm/%40better-auth/expo", "product": "Better Auth", "vendor": "better-auth", "versions": [{"lessThan": "1.7.16", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "@better-auth/expo before 1.7.16 allows certain account-takeover outcomes (e.g., unauthenticated changes of any account's email address), because it signs a caller-supplied state value without checking whether that value had been issued by the server. NOTE: the application secret must be rotated after updating to a fixed version."}], "id": "CVE-2026-121802", "lastModified": "2026-11-04T03:17:15.877", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "[email protected]", "type": "Secondary"}]}, "published": "2026-11-04T03:17:15.730", "references": [{"source": "[email protected]", "url": "https://github.com/better-auth/better-auth/blob/main/packages/expo/CHANGELOG.md"}, {"source": "[email protected]", "url": "https://github.com/better-auth/better-auth/releases/tag/v1.7.16"}, {"source": "[email protected]", "url": "https://github.com/better-auth/better-auth/security/advisories/GHSA-4wq4-2ppv-q3hg"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-346"}], "source": "[email protected]", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.7.16)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Better Auth", "source": "cna", "vendor": "better-auth"}, "product": "better_auth", "vendor": "better-auth"}], "created": "2026-11-04T05:45:08.370545+00:00", "title": "Unauthenticated State Signing Allows Account Email Changes", "updated": "2026-11-04T09:15:07.722194+00:00", "vendors": ["better-auth", "better-auth$PRODUCT$better_auth"]}