Is this vulnerability remotely exploitable over the internet?

Yes, but indirectly. An attacker does not connect to the dev server directly; instead, they host a malicious webpage that, when opened by a developer in a browser, sends cross-origin requests to the developer's local `tinacms` dev server. From the attacker's perspective, it becomes a remote drive-by attack relying on the victim's browser as the intermediary.

What level of access does an attacker need to exploit this?

The attacker needs no prior access to the developer's machine or network. They only need to convince the developer to visit an attacker-controlled site while the TinaCMS dev server is running and reachable (e.g., on localhost). The permissive CORS and path traversal flaws allow the malicious site to perform file operations via the dev server.

What is the safest general fix pattern for this kind of issue?

The fundamental fix is twofold: strictly confine all file operations to a well-defined, validated directory tree, and avoid granting broad cross-origin access to endpoints that manipulate local resources. File paths derived from HTTP input should be normalized and checked against a fixed root, and CORS should be limited or disabled on privileged routes.

Severity:

CRITICAL RISK

(9.6)

Path Traversal with Permissive CORS (CWE-22, CWE-942) in TinaCMS CLI Dev Server

CVE-2026-28792

Published:

Mar 12, 2026

Status:

Modified

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-918

HIGH RISK

HIGH

(8.6)

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Unauthorized Access to Internal Resources via SSRF

May 6, 2026

CWE-863

HIGH RISK

HIGH

(8.8)

Authorization Bypass (CWE-863) in OpenClaw Matrix Room Control Commands

Privilege Escalation via Bypassed Access Control

May 6, 2026

Vulnerability Type

Category:

Path Traversal with Insecure Cross-Origin Resource Sharing (CORS)

CWE:

CWE-22;CWE-942

Impact:

Arbitrary File Read/Write/Delete on Developer Machines via Drive-by Browser Attack

Severity:

CRITICAL RISK

(9.6)

CVSS Version:

3.1

Vulnerability Type

Category:

Path Traversal with Insecure Cross-Origin Resource Sharing (CORS)

CWE:

CWE-22;CWE-942

Impact:

Arbitrary File Read/Write/Delete on Developer Machines via Drive-by Browser Attack

Severity:

CRITICAL RISK

(9.6)

CVSS Version:

3.1

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Path Traversal with Permissive CORS (CWE-22, CWE-942) in TinaCMS CLI Dev Server

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(8.6)

Server-Side Request Forgery (CWE-918) in OpenClaw Zalo Plugin sendPhoto

HIGH RISK

HIGH

(8.8)

Authorization Bypass (CWE-863) in OpenClaw Matrix Room Control Commands

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Ship clean & secure code faster

Ship clean & secure code faster

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