CVE-2026-28792CWE-22CWE-942

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

Critical · published March 12, 2026

CVSS v3.1
9.7
EPSS
1%
Percentile
50.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.7 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00652 · 50.4th percentile
Weaknesses
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'); CWE-942 · Permissive Cross-domain Security Policy with Untrusted Domains
Published
2026-03-12T16:48Z
EPSS history
Timeline
  • 12 MAR 16:48Z
    Cross-Origin File Exfiltration via CORS Misconfiguration + Path Traversal in TinaCMS
    cvelistv5