# CVE-2026-55441: mise: Arbitrary command execution via task-include files in an untrusted, config-less repository

> Attackers can execute arbitrary commands when victims list tasks in an untrusted repository due to missing trust checks on task-include files.

- **Severity:** High 8.6 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 26 Jun 2026
- **Updated:** 26 Jun 2026
- **Also known as:** GHSA-77g9-363w-rccq

## What is CVE-2026-55441?

CVE-2026-55441 is a high-severity command injection vulnerability in jdx mise, published on 26 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

mise manages dev tools like node, python, cmake, and terraform. Prior to 2026.6.4, mise's trust feature gates config files (mise.toml, .tool-versions) through trust_check, but task-include files are loaded on a path that never reaches it. When a directory has a task-include dir (mise-tasks/, .mise/tasks/, …) but no config file, mise falls back to the default includes and renders each task's tera fields — and that tera environment has exec() registered. A {{ exec(command='…') }} in any rendered field runs arbitrary commands the moment the tasks are merely listed. There's no config file to gate on, so no trust prompt ever appears. Read-only commands trigger it: mise tasks, mise task ls, mise run, mise tasks --usage (the query shell completion runs on Tab). The victim only has to cd into a cloned repo and list or tab-complete a task. This vulnerability is fixed in 2026.6.4.

Weakness: CWE-94 (Improper Control of Generation of Code), CWE-78 (Improper Neutralization of Special Elements used in an OS Command), CWE-732 (Incorrect Permission Assignment for Critical Resource)

## Which versions are affected by CVE-2026-55441?

2 open source packages ship an affected version, including mise.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `mise` | crates.io | All versions | 2026.6.4 |
| `mise` | crates.io | All versions | 2026.6.4 |

## How do I fix CVE-2026-55441?

Upgrade mise to 2026.6.4 or later.

## Is CVE-2026-55441 being exploited?

There is no known exploitation of CVE-2026-55441 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-55441 and fix it if it is affected.

What it is: CVE-2026-55441 is a high-severity command injection vulnerability in jdx mise, published on 26 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-55441 in the wild and no public exploit code.

Affected packages and fixed versions:
- mise (crates.io): affected all versions; fixed in 2026.6.4
- mise (crates.io): affected all versions; fixed in 2026.6.4

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-55441/ (Markdown: https://insights.sbomify.com/CVE-2026-55441/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-55441
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-55441
- OSV: https://osv.dev/vulnerability/CVE-2026-55441

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-55441/
Summaries are generated and may contain mistakes; the official description above is the record.