CVE-2026-28793

Path Traversal Leading to Arbitrary File Read, Write and Delete in TinaCMS

State: Published
Severity: 8.4 High
Published: Mar 12, 2026
Updated: Mar 13, 2026
Reserved: Mar 3, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	8.4 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected Products

Product	Versions
cli@tinacms	< 2.1.8Affected

References

https://github.com/tinacms/tinacms/security/advisories/GHSA-2f24-mg4x-534q

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