CVE-2026-55448
MediumCVSS 6.3Exploitation Probability (EPSS)
Low risk5th percentile — higher than 5% of all known CVEs
Summary
The mise tool (versions from 2026.3.15 to 2026.6.4) loads github.credential_command from a local project config before any trust decision, then executes that value with sh -c when resolving a GitHub token. An attacker who can place a .mise.toml in a repository can execute arbitrary shell commands when the victim runs a GitHub-related mise command and no higher-priority GitHub token environment variable is set.
Risk Assessment
The risk is remote code execution (RCE) in the context of the victim's user, which could lead to system compromise, data theft, or further propagation of the attack within the environment.
Recommendation
Immediately update mise to version 2026.6.4 or later. Until updated, avoid running GitHub-related mise commands in repositories from untrusted sources.
Original NVD description (English source)
mise manages dev tools like node, python, cmake, and terraform. From 2026.3.15 until 2026.6.4, mise loads github.credential_command from local project config before any trust decision, then executes that value with sh -c when resolving a GitHub token. An attacker who can place a .mise.toml in a repository can execute arbitrary shell commands when the victim runs a GitHub-related mise command and no higher-priority GitHub token environment variable is set. This vulnerability is fixed in 2026.6.4.