CVE-2026-53513

{"id": "CVE-2026-53513", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-53513", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-07-15T19:28:52.542592Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.6, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.8, "exploitabilityScore": 3.1}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "better-auth", "product": "better-auth", "versions": [{"status": "affected", "version": ">= 0.1.0, < 1.6.11"}]}, {"vendor": "@better-auth", "product": "sso", "versions": [{"status": "affected", "version": ">= 0.1.0, < 1.6.11"}]}]}], "published": "2026-07-15T18:16:47.547", "references": [{"url": "https://github.com/better-auth/better-auth/commit/37f60cb176cb53147da7dfd5ec15afa5b486e81e", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/better-auth/better-auth/pull/9574", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/better-auth/better-auth/releases/tag/v1.6.11", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/better-auth/better-auth/security/advisories/GHSA-5rr4-8452-hf4v", "tags": ["Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-20"}, {"lang": "en", "value": "CWE-345"}, {"lang": "en", "value": "CWE-441"}, {"lang": "en", "value": "CWE-918"}]}], "descriptions": [{"lang": "en", "value": "Better Auth is an authentication and authorization library for TypeScript. Prior to 1.6.11, the @better-auth/sso plugin's POST /sso/register and POST /sso/update-provider endpoints accept attacker-controlled oidcConfig.userInfoEndpoint, tokenEndpoint, and jwksEndpoint URLs when skipDiscovery: true is set, store them on the ssoProvider row without origin validation, and fetch them during OIDC callback, allowing non-blind server-side request forgery and possible account linking when trustEmailVerified: true is configured. This issue is fixed in version 1.6.11."}], "lastModified": "2026-07-21T15:39:52.240", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:better-auth:better-auth\\/sso:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "0D0F5415-92A8-4183-8B26-2DBC9577118D", "versionEndExcluding": "1.6.11"}, {"criteria": "cpe:2.3:a:better-auth:better_auth:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "5FB9E99E-F122-4AB6-9D37-19884EE5EF01", "versionEndExcluding": "1.6.11", "versionStartIncluding": "0.1.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}