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CVE-2026-59172NVD
Vulnerability Summary
## Impact
In Joker versions before 1.8.2, `joker --lint <file>` 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).
In Joker versions before 1.8.2, `joker --lint <file>` 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).
CVSS v3.1 Base Metrics
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh