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.
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 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.jdx.dev is the asset host for mise. It's used to host precompiled mise CLI binaries, and hosts a "VERSION" which mise uses to occasionally check for a new version being released. Everything hosted there uses a single vendor to reduce surface area.
mise will verify signatures of tools using cosign and slsa-verifier if cosign/slsa-verifier is installed and the tool is configured to support it. Typically, these will be tools using aqua as the backend. See the aqua docs for more on how this is configured in the aqua registry.
mise has support for lockfiles 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 are by far the biggest source of potential problems since they are typically not written by the tool vendor and do not have checksum or signature verification—or if they do it isn't tied into mise lockfiles.
I'm actively moving away from using asdf plugins where possible towards backends like aqua and ubi. This has the added benefit of supporting Windows if the tool itself supports it. If a tool uses an asdf plugin you will receive a prompt in mise before installing it to check the plugin's source code.
Please contribute to this effort by checking if a tool works in ubi or aqua and submitting a PR to registry.toml 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 in any other way.
The only supported version is the most recent one.
Send an email to security@<MISE_JDX_DOMAIN_IN_README>
If you want, you may encrypt the message with GPG:
@jdx's public key
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