{"id":"CVE-2026-63506","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-63506","generatedAt":"2026-10-28T02:57:44.353Z","title":"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…","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.","published":"2026-09-16T21:17:13.000Z","lastModified":"2026-09-30T17:51:56.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-639"],"affected":[],"epss":{"score":0.00523,"percentile":0.44127,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.52%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"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"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63506","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}