CVE-2026-55448

mise: Local credential_command executes untrusted config

State: Published
Severity: 6.3 Medium
Published: Jun 26, 2026
Updated: Jun 27, 2026
Reserved: Jun 16, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	6.3 Medium	CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N	GitHub_M

Weaknesses

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Affected Products

Product	Versions
misejdx	< 2026.6.4Affected

References

https://github.com/jdx/mise/security/advisories/GHSA-29hf-rm4x-xxph

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