CVE-2026-63506
Tina: [Broken Access Control] letting any TinaCloud user authorize against any self-hosted site
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Deferred | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.52% · top 55% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Weakness
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npm@tinacms/authGHSA-g74q-6g2f-874x (opens in a new tab)
- npmnext-tinacms-azureGHSA-g74q-6g2f-874x (opens in a new tab)
References (5)
- https://github.com/tinacms/tinacms/security/advisories/GHSA-g74q-6g2f-874x (opens in a new tab)x_refsource_CONFIRMexploit
- https://github.com/tinacms/tinacms/pull/7168 (opens in a new tab)x_refsource_MISC
- https://github.com/tinacms/tinacms/commit/0a927a4f8d228dd05ee7ca4be32899bc190e73af (opens in a new tab)x_refsource_MISC
- https://github.com/tinacms/tinacms/releases/tag/@tinacms/[email protected] (opens in a new tab)x_refsource_MISC
- https://github.com/tinacms/tinacms/releases/tag/[email protected] (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-g74q-6g2f-874x (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-63506)Record last updated .