CVE-2026-63506

{"id": "CVE-2026-63506", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-63506", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-09-17T15:54:06.674922Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "tinacms", "product": "tinacms", "versions": [{"status": "affected", "version": "< 1.1.4"}]}, {"vendor": "@tinacms", "product": "auth", "versions": [{"status": "affected", "version": "< 1.1.4"}]}, {"vendor": "tinacms", "product": "next-tinacms-azure", "versions": [{"status": "affected", "version": "< 15.0.1"}]}]}], "published": "2026-09-16T21:17:13.163", "references": [{"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": "security-advisories@github.com"}, {"url": "https://github.com/tinacms/tinacms/security/advisories/GHSA-g74q-6g2f-874x", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Received", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-639"}]}], "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."}], "lastModified": "2026-09-17T16:17:35.987", "sourceIdentifier": "security-advisories@github.com"}