Threats affecting pkg:npm/@tinacms/cli

A code injection vulnerability exists in @tinacms/cli prior to version 3.0.0 where unescaped Git branch names are directly interpolated into generated client source code. This allows an attacker controlling the branch name to inject arbitrary JavaScript expressions that execute during the consumer build process. The vulnerability arises because the branch name is inserted into a string literal without proper escaping or encoding. The impact includes arbitrary code execution with build process privileges, potentially exposing environment variables and enabling supply-chain compromise. A patch is available to fix this issue.

CVE-2026-29066 is a medium-severity vulnerability in the @tinacms CLI prior to version 2.1.8. The issue arises because the TinaCMS CLI dev server disables Vite's filesystem access restrictions by setting server.fs.strict to false. This misconfiguration allows any unauthenticated attacker who can reach the development server to read arbitrary files on the host system. The vulnerability impacts confidentiality but does not affect integrity or availability. It requires network access to the dev server but no authentication or user interaction. The flaw is fixed in version 2.

CVE-2026-28792 is a critical path traversal vulnerability in the @tinacms CLI dev server prior to version 2.1.8. The vulnerability arises from a combination of a permissive CORS policy (Access-Control-Allow-Origin: *) and improper pathname limitation, allowing remote attackers to perform browser-based drive-by attacks. By tricking developers into visiting a malicious website while the tinacms dev server is running, attackers can enumerate, write, and delete arbitrary files on the developer's machine. This vulnerability affects versions before 2.1.8 and has a CVSS score of 9.7, indicating critical severity. No known exploits are currently reported in the wild.