Vulnerability · Published Mar 12, 2026 · Assigned by GitHub_M
CVE-2026-28793Path Traversal Leading to Arbitrary File Read, Write and Delete in TinaCMS
High 8.4
In plain English
A high-severity path traversal in cli from @tinacms. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Tina is a headless content management system. Prior to 2.1.8, the TinaCMS CLI development server exposes media endpoints that are vulnerable to path traversal, allowing attackers to read and write arbitrary files on the filesystem outside the intended media directory. When running tinacms dev, the CLI starts a local HTTP server (default port 4001) exposing endpoints such as /media/list/*, /media/upload/*, and /media/*. These endpoints process user-controlled path segments using decodeURI() and path.join() without validating that the resolved path remains within the configured media directory. This vulnerability is fixed in 2.1.8.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @tinacms/cli | 2.1.8 | GHSA-2f24-mg4x-534q |
Affected products (as reported)
Weakness: CWE-22 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/tinacms/tinacms/security/advisories/GHSA-2f24-mg4x-534q x_refsource_CONFIRM