CVE-2026-28792

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

State: Published
Severity: 9.7 Critical
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 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.

Scores

CVSS	Score	Vector	Source
3.1	9.7 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-942 Permissive Cross-domain Policy with Untrusted Domains

Affected Products

Product	Versions
cli@tinacms	< 2.1.8Affected

References

https://github.com/tinacms/tinacms/security/advisories/GHSA-8pw3-9m7f-q734

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