Vulnerability · Published Jun 26, 2026 · Assigned by GitHub_M

CVE-2026-55448mise: Local credential_command executes untrusted config

Medium 6.3

In plain English

A medium-severity OS command injection in mise from jdx. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium

Exploit odds (30 days)0.2%top 90.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
jdx	mise	< 2026.6.4

Weakness: CWE-78 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

References

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