What is the CVSS score of CVE-2026-28792?

CVE-2026-28792 has a CVSS 3.1 base score of 9.6 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.3%.

Which versions of Tinacms Cli are affected by CVE-2026-28792?

TinaCMS developers face critical risk of unauthorized filesystem access and file manipulation through drive-by attacks requiring only a malicious website visit.. A patch is available.

Is there a public PoC exploit available for CVE-2026-28792?

Yes, a public proof-of-concept exploit is available for CVE-2026-28792. Prioritise patching immediately. EPSS: 0.3%.

How to fix or mitigate CVE-2026-28792?

Within 24 hours: Notify all development teams using TinaCMS to cease using the CLI dev server and switch to alternative development workflows; document affected developer machines. Within 7 days: Conduct forensic review of developer machines for unauthorized file modifications or deletions; audit git commit history for anomalies. Within 30 days: Evaluate TinaCMS alternatives or establish monitoring for vendor patch release; implement network segmentation isolating dev machines from untrusted internet access during development work.

Tinacms Cli CVE-2026-28792

CRITICAL

Path Traversal (CWE-22)

2026-03-12 security-advisories@github.com

GHSA-8pw3-9m7f-q734

Path Traversal Tinacms Cli

9.6

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

9.6 CRITICAL

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

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

PoC Detected

Mar 13, 2026 - 19:54 vuln.today

Public exploit code

Analysis Generated

Mar 12, 2026 - 19:57 vuln.today

CVE Published

Mar 12, 2026 - 17:16 nvd

CRITICAL 9.6

DescriptionGitHub Advisory

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.

AnalysisAI

TinaCMS CLI dev server combines a permissive CORS policy (Access-Control-Allow-Origin: *) with path traversal to enable drive-by attacks. A remote attacker can enumerate, write, and delete files on a developer's machine simply by having them visit a malicious webpage. PoC available.

Technical ContextAI

The TinaCMS CLI dev server sets Access-Control-Allow-Origin: * (CWE-22 path traversal combined with CORS misconfiguration). This allows any website to make cross-origin requests to the developer's local Tina server. Combined with path traversal, an attacker's website can silently enumerate the filesystem, inject backdoors into source code, or delete files.