{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63506","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-07-16T21:49:52.069Z","datePublished":"2026-09-16T20:27:37.385Z","dateUpdated":"2026-09-17T15:54:38.071Z"},"containers":{"cna":{"title":"Tina: [Broken Access Control] letting any TinaCloud user authorize against any self-hosted site","problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"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"}}],"references":[{"name":"https://github.com/tinacms/tinacms/security/advisories/GHSA-g74q-6g2f-874x","tags":["x_refsource_CONFIRM"],"url":"https://github.com/tinacms/tinacms/security/advisories/GHSA-g74q-6g2f-874x"},{"name":"https://github.com/tinacms/tinacms/pull/7168","tags":["x_refsource_MISC"],"url":"https://github.com/tinacms/tinacms/pull/7168"},{"name":"https://github.com/tinacms/tinacms/commit/0a927a4f8d228dd05ee7ca4be32899bc190e73af","tags":["x_refsource_MISC"],"url":"https://github.com/tinacms/tinacms/commit/0a927a4f8d228dd05ee7ca4be32899bc190e73af"},{"name":"https://github.com/tinacms/tinacms/releases/tag/@tinacms/auth@1.1.4","tags":["x_refsource_MISC"],"url":"https://github.com/tinacms/tinacms/releases/tag/@tinacms/auth@1.1.4"},{"name":"https://github.com/tinacms/tinacms/releases/tag/next-tinacms-azure@15.0.1","tags":["x_refsource_MISC"],"url":"https://github.com/tinacms/tinacms/releases/tag/next-tinacms-azure@15.0.1"}],"affected":[{"vendor":"tinacms","product":"tinacms","versions":[{"version":"< 1.1.4","status":"affected"}]},{"vendor":"@tinacms","product":"auth","versions":[{"version":"< 1.1.4","status":"affected"}]},{"vendor":"tinacms","product":"next-tinacms-azure","versions":[{"version":"< 15.0.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-16T20:27:37.385Z"},"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."}],"source":{"advisory":"GHSA-g74q-6g2f-874x","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/tinacms/tinacms/security/advisories/GHSA-g74q-6g2f-874x","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-17T15:54:06.674922Z","id":"CVE-2026-63506","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-17T15:54:38.071Z"}}]}}