CVE-2026-63506

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{"affected": [{"affectedData": [{"product": "tinacms", "vendor": "tinacms", "versions": [{"status": "affected", "version": "< 1.1.4"}]}, {"product": "auth", "vendor": "@tinacms", "versions": [{"status": "affected", "version": "< 1.1.4"}]}, {"product": "next-tinacms-azure", "vendor": "tinacms", "versions": [{"status": "affected", "version": "< 15.0.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Tina is a headless content management system. Prior to @tinacms/auth 1.1.4 and next-tinacms-azure 15.0.1, isAuthorized accepts a request-controlled clientID and asks isUserAuthorized to validate the bearer token against that selected TinaCloud app instead of the self-hosted site's configured app. An attacker with any TinaCloud account can submit the attacker's own app ID and valid token to a victim endpoint, causing TinaCloudBackendAuthProvider or an affected media authorized callback to accept the attacker's verified status across the tenant boundary. The vulnerable logic is present in packages/@tinacms/auth/src/index.ts and packages/next-tinacms-azure/src/auth.ts. Successful exploitation permits media listing, reading, upload, or deletion and, when TinaCloudBackendAuthProvider is used, GraphQL read, create, update, and delete operations on the victim's content without a victim account or victim interaction. This vulnerability is fixed in @tinacms/auth 1.1.4 and next-tinacms-azure 15.0.1."}], "id": "CVE-2026-63506", "lastModified": "2026-09-30T17:51:56.193", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-63506", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-17T15:54:06.674922Z", "version": "2.0.3"}}]}, "published": "2026-09-16T21:17:13.163", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/tinacms/tinacms/commit/0a927a4f8d228dd05ee7ca4be32899bc190e73af"}, {"source": "security-advisories@github.com", "url": "https://github.com/tinacms/tinacms/pull/7168"}, {"source": "security-advisories@github.com", "url": "https://github.com/tinacms/tinacms/releases/tag/@tinacms/auth@1.1.4"}, {"source": "security-advisories@github.com", "url": "https://github.com/tinacms/tinacms/releases/tag/next-tinacms-azure@15.0.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/tinacms/tinacms/security/advisories/GHSA-g74q-6g2f-874x"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/tinacms/tinacms/security/advisories/GHSA-g74q-6g2f-874x"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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