{"id":"CVE-2026-63506","state":"PUBLISHED","title":"Tina: [Broken Access Control] letting any TinaCloud user authorize against any self-hosted site","description":"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.","publishedAt":"2026-09-16T20:27:37.385Z","updatedAt":"2026-09-17T15:54:38.071Z","severity":{"score":8.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["tinacms tinacms","@tinacms auth","tinacms next-tinacms-azure"],"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"}]}],"references":["https://github.com/tinacms/tinacms/security/advisories/GHSA-g74q-6g2f-874x","https://github.com/tinacms/tinacms/pull/7168","https://github.com/tinacms/tinacms/commit/0a927a4f8d228dd05ee7ca4be32899bc190e73af","https://github.com/tinacms/tinacms/releases/tag/@tinacms/auth@1.1.4","https://github.com/tinacms/tinacms/releases/tag/next-tinacms-azure@15.0.1"],"weaknesses":["CWE-639"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/63xxx/CVE-2026-63506.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63506","state":"PUBLISHED","datePublished":"2026-09-16T20:27:37.385Z","dateUpdated":"2026-09-17T15:54:38.071Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-16T21:49:52.069Z"},"containers":{"cna":{"title":"Tina: [Broken Access Control] letting any TinaCloud user authorize against any self-hosted site","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."}],"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"}]}],"references":[{"url":"https://github.com/tinacms/tinacms/security/advisories/GHSA-g74q-6g2f-874x","name":"https://github.com/tinacms/tinacms/security/advisories/GHSA-g74q-6g2f-874x","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/tinacms/tinacms/pull/7168","name":"https://github.com/tinacms/tinacms/pull/7168","tags":["x_refsource_MISC"]},{"url":"https://github.com/tinacms/tinacms/commit/0a927a4f8d228dd05ee7ca4be32899bc190e73af","name":"https://github.com/tinacms/tinacms/commit/0a927a4f8d228dd05ee7ca4be32899bc190e73af","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/@tinacms/auth@1.1.4","tags":["x_refsource_MISC"]},{"url":"https://github.com/tinacms/tinacms/releases/tag/next-tinacms-azure@15.0.1","name":"https://github.com/tinacms/tinacms/releases/tag/next-tinacms-azure@15.0.1","tags":["x_refsource_MISC"]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-16T20:27:37.385Z"},"source":{"advisory":"GHSA-g74q-6g2f-874x","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-17T15:54:38.071Z"}}]}}}