{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-71402", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-07-18T12:38:41.077Z", "datePublished": "2026-08-01T12:22:16.655Z", "dateUpdated": "2026-08-01T12:22:16.655Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-01T12:22:16.655Z"}, "datePublic": "2025-11-26T00:00:00.000Z", "title": "better-auth before 1.4.0 Session Revocation via Forged Cookie", "descriptions": [{"lang": "en", "value": "better-auth versions greater than 1.3.34 and before 1.4.0 contain a vulnerability in the multi-session plugin's /sign-out after-hook, which trusts raw multi-session cookies and forwards extracted values to internalAdapter.deleteSessions without verifying the cookie signature (e.g., via getSignedCookie). An attacker can supply a forged _multi-* cookie to trigger deletion of arbitrary session tokens."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Verification of Cryptographic Signature", "cweId": "CWE-347", "type": "CWE"}]}], "affected": [{"vendor": "better-auth", "product": "better-auth", "defaultStatus": "unaffected", "packageURL": "pkg:npm/better-auth", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "1.4.0"}, {"version": "1.4.0", "status": "unaffected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:better-auth:better-auth\\/oauth-provider:*:*:*:*:*:node.js:*:*", "versionEndExcluding": "1.4.0"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "HIGH", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "baseScore": 2, "baseSeverity": "LOW"}}], "references": [{"url": "https://github.com/better-auth/better-auth/security/advisories/GHSA-wmjr-v86c-m9jj", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-wmjr-v86c-m9jj)"}, {"name": "VulnCheck Advisory: better-auth before 1.4.0 Session Revocation via Forged Cookie", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/better-auth-before-session-revocation-via-forged-cookie"}], "credits": [{"lang": "en", "value": "mufeedvh", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": ["node.js"], "status": "affected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 99.0, "source": "matching"}]}, "original": {"product": "better-auth", "source": "cna", "vendor": "better-auth"}, "product": "better-auth\\/oauth-provider", "vendor": "better-auth"}], "created": "2026-08-01T14:15:03.468032+00:00", "updated": "2026-08-01T14:15:03.468049+00:00", "vendors": ["better-auth", "better-auth$PRODUCT$better-auth\\/oauth-provider"]}