CVE-2026-28792

Cross-Origin File Exfiltration via CORS Misconfiguration + Path Traversal in TinaCMS

Tina is a headless content management system. Prior to 2.1.8 , the TinaCMS CLI dev server combines a permissive CORS configuration (Access-Control-Allow-Origin: *) with the path traversal vulnerability (previously reported) to enable a browser-based drive-by attack. A remote attacker can enumerate the filesystem, write arbitrary files, and delete arbitrary files on developer's machines by simply tricking them into visiting a malicious website while tinacms dev is running. This vulnerability is fixed in 2.1.8.

Affected

@tinacms · cli

CVSS v3.1 GITHUB

9.6 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

EPSS

0.65% chance of exploitation in the next 30 days, 50th percentile

Published

2026-03-12

Updated

2026-03-13

Proof-of-concept exploits (1)

• advisories/GHSA-8pw3-9m7f-q734

Security advisories

• tinacms/tinacms/security/advisories/GHSA-8pw3-9m7f-q734

References

• CVE Record
• NVD entry