What is CVE-2026-28793?

CVE-2026-28793 is a high-severity vulnerability in Ssw Tinacms\/cli, classified under Path Traversal. CVSS score: 8.4/10. Published 2026-03-12.

How severe is CVE-2026-28793?

High severity. CVSS v3 base score is 8.4 out of 10.

Path Traversal in Ssw Tinacms\/cli

CVE-2026-28793

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.

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.002 (10.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ssw Tinacms\/cli
@Tinacms Cli — versions < 2.1.8

Weakness classification (CWE)

CWE-22 — Path Traversal

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-28793?: CVE-2026-28793 is a high-severity vulnerability in Ssw Tinacms\/cli, classified under Path Traversal. CVSS score: 8.4/10. Published 2026-03-12.
How severe is CVE-2026-28793?: High severity. CVSS v3 base score is 8.4 out of 10.