CVE-2026-63506Tina: [Broken Access Control] letting any TinaCloud user authorize against any self-hosted site
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-639
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Sep 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
tinacms tinacms tinacms:tinacms (from the name) | before 1.1.4 | CNA record |
@tinacms auth tinacms:auth (from the name) | before 1.1.4 | CNA record |
tinacms next-tinacms-azure tinacms:next_tinacms_azure (from the name) | before 15.0.1 | CNA record |
References
- https://github.com/tinacms/tinacms/security/advisories/GHSA-g74q-6g2f-874xx-refsource-confirm
- https://github.com/tinacms/tinacms/pull/7168x-refsource-misc
- https://github.com/tinacms/tinacms/commit/0a927a4f8d228dd05ee7ca4be32899bc190e73afx-refsource-misc
- https://github.com/tinacms/tinacms/releases/tag/@tinacms/auth@1.1.4x-refsource-misc
- https://github.com/tinacms/tinacms/releases/tag/next-tinacms-azure@15.0.1x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.