GHSA-m835-3cm9-rggg — Joker linter executed project-local .jokerd/linter.* files during linting

2026-10-29T18:52:18.873009+00:00

Affected: Go: github.com/candid82/joker

## Impact

In Joker versions before 1.8.2, `joker --lint ` located a `.jokerd/` directory by walking up from the linted file and executed matching `linter.*` files from that directory before linting. Because these files are executable Joker/Clojure code, linting a file inside an untrusted repository could execute code supplied by that repository.

This could be triggered by editor integrations or CI jobs that automatically run `joker --lint` on checked-out source code.

## Patches

Fixed in Joker v1.8.2. Executable linter customization files are now loaded only from the user's home `.jokerd` directory (`~/.jokerd/linter.cljc`, `~/.jokerd/linter.clj`, `~/.jokerd/linter.cljs`, or `~/.jokerd/linter.joke`). Project-local `.jokerd/linter.*` files are no longer executed.

## Workarounds

Users who cannot upgrade should avoid running `joker --lint` on untrusted repositories, especially through editor integrations or unattended CI. Removing or disabling project-local `.jokerd/linter.*` files before linting also avoids the code-execution path.

## Credits

Reported by Younghun Ko of AhnLab (@koyokr).

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GHSA-m835-3cm9-rggg — Joker linter executed project-local .jokerd/linter.* files during linting