# Security Policy

mise is a convenient tool to manage developer tools, however its model is also open to potential risks. The following
are major areas of mise and the security considerations currently being made and what needs to be made in the future.

Please open a ticket or send me an email if you have thoughts on how mise can be made more secure.

## Core CLI Security

Development of the "core CLI" is done on jdx/mise which only a single developer (me, @jdx) has access to.
Other contributors may only submit contributions via public Pull Requests. Reducing the number
of developers with access down to 1 minimizes the chance of keys being leaked.

This does create a [bus factor](https://en.wikipedia.org/wiki/Bus_factor) problem. If I suddenly died one day
or otherwise wasn't able to continue development at all there are some successors listed in my GitHub account
that can take over my account if need be.

The dependencies in the core CLI are a security vector. I've tried to be judicious about what dependencies make it into
the project. I only select dependencies with broad usage across the Rust community where possible.
I'm open to PRs or suggestions on reducing dependency count even at the cost of functionality because it will make
mise more secure.

## mise.en.dev

mise.en.dev is the asset host for mise. It's used to host precompiled mise CLI binaries, and hosts a "[VERSION](https://mise.en.dev/VERSION)"
which mise uses to occasionally check for a new version being released. Everything hosted there uses a single
vendor to reduce surface area.

## Native Security Verification

mise provides **native Rust implementation** for security verification of tools, eliminating the need for external dependencies like `cosign`, `slsa-verifier`, `minisign`, or `gh` CLI tools. This applies to tools using the aqua backend.

### Supported Verification Methods

- **Cosign signatures**: Keyless and key-based signature verification
- **SLSA provenance**: Verification of Supply-chain Levels for Software Artifacts (SLSA) attestations
- **GitHub Artifact Attestations**: Verification of GitHub's artifact attestation system
- **Minisign verification**: Verification of minisign signatures
- **Checksum verification**: Always enabled for supported backends

### Configuration

All verification methods are enabled by default and can be configured via environment variables:

```bash
# Enable/disable specific verification methods
export MISE_AQUA_COSIGN=true                 # Default: true
export MISE_AQUA_SLSA=true                   # Default: true
export MISE_AQUA_GITHUB_ATTESTATIONS=true    # Default: true
export MISE_AQUA_MINISIGN=true               # Default: true
```

### How it Works

You will see this verification happen automatically when aqua tools are installed. The verification status is displayed during installation with progress indicators. If any verification fails, the installation will be aborted.

See the [aqua docs](https://aquaproj.github.io/docs/reference/security/cosign-slsa) for more on how verification is configured in the [aqua registry](https://github.com/aquaproj/aqua-registry).

If you notice a tool offers security verification methods (gpg/slsa/cosign/minisign/etc), consider making a PR to the aqua registry to enable verification for that tool.

## `mise.lock`

mise has support for [lockfiles](https://mise.en.dev/configuration/settings.html#lockfile) which will
store/verify the checksum of tool tarballs. Committing this into your repository is a good way to ensure
that the exact same version of a tool is installed across all developers and CI/CD systems.

Not all backends support this—notably asdf plugins do not.

## asdf plugins

asdf plugins in asdf (but not with mise's default tools) are dangerous. They are typically owned by random developers
unconnected to either asdf or the tool vendor. They may get hacked or maliciously inject code into
their plugin that could trivially execute code on your machine.

asdf plugins are not used for tools inside the [registry](https://github.com/jdx/mise/blob/main/registry/) whenever possible.
Sometimes it is not possible to use more secure backends like aqua/ubi because tools have complex install
setups or need to export env vars. As of 2025-01-08, <25% of tools use asdf plugins as the default backend.
All of these are hosted in the [mise-plugins org](https://github.com/mise-plugins) to secure the supply
chain so you do not need to rely on plugins maintained by anyone except me.

Of course if you _manually_ add plugins not from the mise-plugins org you will want to ensure they
are coming from a trusted source.

Please contribute to this effort to migrate away from asdf plugins by checking if a tool works in ubi or aqua and submitting a PR to
[registry/](https://github.com/jdx/mise/blob/main/registry/) to add it. If it doesn't work
in ubi or is missing from aqua, submit an issue or PR to the respective project to add it. New tools
using asdf are **not** likely to be accepted unless they cannot be supported with any other backend.

## Supported Versions

The only supported version is the most recent one.

## Reporting a Vulnerability

Send an email to security@<MISE_JDX_DOMAIN_IN_README>

If you want, you may encrypt the message with GPG:

<details>
  <summary>@jdx's public key</summary>

```
-----BEGIN PGP PUBLIC KEY BLOCK-----

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=/CHf
-----END PGP PUBLIC KEY BLOCK-----

```

</details>

## Release gpg key

This is the gpg key used to sign deb releases and the SHASUMS files
contained within releases.

<details>
  <summary>Release gpg key</summary>

```
-----BEGIN PGP PUBLIC KEY BLOCK-----
mQINBGWUNRYBEAC1Sz9QTV039Kxez3Olzf0bLPKFjyRovwx1sTCUZUfkYid9qlSw
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=yIM2
-----END PGP PUBLIC KEY BLOCK-----
```

</details>
