Executive brief
mise, a tool for managing development environments like Node.js and Python, contains a security flaw that allows for unauthorized command execution. If a user opens a project containing a malicious configuration file and runs certain commands, the attacker can execute arbitrary code on the user's computer. This could lead to the theft of sensitive data or full system compromise.
Technical details
A command injection vulnerability exists in mise versions 2026.3.15 through 2026.6.3. The application improperly loads the 'github.credential_command' setting from local '.mise.toml' project files without performing a trust check. When mise attempts to resolve a GitHub token and no higher-priority environment variables (like GITHUB_TOKEN) are set, it executes the value of this setting using 'sh -c'. An attacker can exploit this by placing a malicious '.mise.toml' file in a repository; when a victim runs a GitHub-related mise command within that directory, the attacker's commands are executed with the victim's privileges. This has been fixed in version 2026.6.4 by ignoring this setting in non-global configuration files.
Affected products
- jdx mise >= 2026.3.15, < 2026.6.4
Timeline
- 2026-06-12: advisory: GitHub advisory published by vendor
- 2026-06-26: disclosed: CVE published to NVD
- 2026-06-04: patched: Fixed in version 2026.6.4