MegaLinter Files

What's Changed

• Core
• Improve files browsing performances (2 PRs)
• Optimize parallel linter processing and improve grouping logic
• Improve performance of listing .gitignored files by sending excluded directories to git ls-files
• If there are more than 500 .gitignored files, advise to add more excluded directories using variable ADDITIONAL_EXCLUDED_DIRECTORIES, to improve performances
• Reduce redundant config lookups, environment copies, and dict rebuilds across config, linter, and utils modules
• Cache subprocess environment per linter run and excluded directories per request
• Optimize parallel linter result update from O(n²) to O(n)

• Add support in the build of Docker images for linux/arm64 in compatible linters

• New linters

• Add PYTHON_NBQA_MYPY for type-checking Jupyter notebooks using nbqa + mypy

• Disabled linters

• LUA_SELENE: https://github.com/Kampfkarren/selene/issues/662

• Linters enhancements

• Use the official checkmake image by @bdovaz
• Spectral: Add sarif support to spectral by @bdovaz

• Spectral: Change cli_lint_mode to list_of_files to improve performances

• Fixes

• Add support for SSH remote origins when building custom flavors (fixes: [#6511])
• Fix issue with plugins ignored when FLAVOR_SUGGESTIONS=false
• Fix wrong tagging apply_fixes=True when linter has no fix options configured
• Python mypy: Remove .ipynb from file extensions (mypy doesn't support notebooks directly) - fixes [#6904]
• Fix operator precedence bug in pre_post_factory pre/post command logic
• Fix file handle leak in GitleaksLinter
• Fix variable name bug in utils.get_git_context_info

• Minor fixes in logger, SqlFluffLinter, PowershellLinter, TrivyLinter

• Reporters

• Add a link inviting to star MegaLinter
• Display in the console reporter the working directory from which the commands are executed by @bdovaz
• Update WebHook reporter so it can send more events for a better integration with UI
• When truncating long comments in markdown reports, keep the end of the text instead of the beginning (which usually contains less useful information)
• In case GitHub Api returns 500, do not make the whole MegaLinter fail, display a warning instead

• Azure Reporter: Use Azure DevOps Services REST API instead of unmaintained python wrapper lib

• Flavors

• Custom flavor builder:

  • Add support for SSH remotes
  • Allow selection of platforms to build the custom flavor on (ex: linux/amd64, linux/arm64) and build compatible linters on these platforms
  • Build & release custom flavor builder image for linux/arm64

• Doc

• JSON Schema: Add default values for file extensions and file names variables + improve descriptions
• Update default secured env variables documentation
• Fix banner img in json_prettier and yaml_prettier docs
• Explain better how to run tests locally

• Vale: Mention community style packages in linter description

• CI

• Free more space on GitHub Actions runners to avoid build failures
• Ignore .isorted files in secretlint to avoid scanning transient files created by other linters
• Avoid duplicate jobs "Mirror docker image"
• Allow to skip linters build using skip linters in latest commit text
• Allow to disable build & push of standalone linters docker images using variable BETA_LINTERS_ENABLED=false
• Improve performances of formatting markdown tables during build
• Improve test classes performances and fix race conditions
• Fix plugin test to work with forks and feature branches

• Update .devcontainer image to trixie

• mega-linter-runner

• If variables are defined in a local .env file, send their values to docker/podman run command (can be useful for secret variables)
• Never send .env file to the docker run for security reasons, instead create an empty one if needed

• Use npm trusted publishers (OIDC) to publish mega-linter-runner

• Linter versions upgrades (59)

• actionlint from 1.7.10 to 1.7.11
• ansible-lint from 25.12.2 to 26.2.0
• bandit from 1.9.2 to 1.9.4
• bicep_linter from 0.39.26 to 0.41.2
• black from 25.12.0 to 26.1.0
• cfn-lint from 1.43.1 to 1.45.0
• checkov from 3.2.497 to 3.2.506
• clippy from 0.1.92 to 0.1.93
• clj-kondo from 2025.12.23 to 2026.01.19
• code-analyzer-apex from 5.7.1 to 5.10.0
• code-analyzer-aura from 5.7.1 to 5.10.0
• code-analyzer-lwc from 5.7.1 to 5.10.0
• csharpier from 1.2.5 to 1.2.6
• cspell from 9.4.0 to 9.7.0
• dartanalyzer from 3.10.7 to 3.11.1
• devskim from 1.0.67 to 1.0.70
• dotnet-format from 9.0.112 to 9.0.114
• editorconfig-checker from 3.6.0 to 3.6.1
• golangci-lint from 2.7.2 to 2.10.1
• grype from 0.104.3 to 0.109.0
• htmlhint from 1.8.0 to 1.9.1
• isort from 7.0.0 to 8.0.0
• jscpd from 4.0.5 to 4.0.8
• jsonlint from 16.0.0 to 17.0.1
• kics from 2.1.18 to 2.1.19
• kingfisher from 1.73.0 to 1.84.0
• kubescape from 3.0.47 to 4.0.2
• npm-groovy-lint from 16.1.1 to 16.2.0
• php-cs-fixer from 3.92.4 to 3.94.2
• phpstan from 2.1.33 to 2.1.40
• pmd from 7.20.0 to 7.22.0
• prettier from 3.7.4 to 3.8.1
• psalm from Psalm.6.14.3@ to Psalm.6.15.1@
• pylint from 4.0.4 to 4.0.5
• pyright from 1.1.407 to 1.1.408
• revive from 1.13.0 to 1.14.0
• robocop from 7.2.0 to 8.2.2
• rubocop from 1.82.1 to 1.85.0
• ruff-format from 0.14.10 to 0.15.4
• ruff from 0.14.10 to 0.15.4
• rumdl from 0.0.208 to 0.1.32
• scalafix from 0.14.5 to 0.14.6
• secretlint from 11.2.5 to 11.3.1
• semgrep from 1.151.0 to 1.153.1
• snakefmt from 0.11.2 to 0.11.4
• snakemake from 9.14.5 to 9.16.3
• sqlfluff from 3.5.0 to 4.0.4
• swiftlint from 0.63.0 to 0.63.2
• syft from 1.39.0 to 1.42.1
• terraform-fmt from 1.14.1 to 1.14.5
• terragrunt from 0.93.13 to 0.99.4
• tflint from 0.60.0 to 0.61.0
• trivy-sbom from 0.68.2 to 0.69.1
• trivy from 0.68.2 to 0.69.1
• trufflehog from 3.92.4 to 3.93.6
• v8r from 5.1.0 to 6.0.0
• vale from 3.13.0 to 3.13.1
• yamllint from 1.37.1 to 1.38.0

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New Contributors

• @mckraken made their first contribution in https://github.com/oxsecurity/megalinter/pull/6899
• @djukxe made their first contribution in https://github.com/oxsecurity/megalinter/pull/6940
• @yousfiSaad made their first contribution in https://github.com/oxsecurity/megalinter/pull/7001
• @stuckvgn made their first contribution in https://github.com/oxsecurity/megalinter/pull/7266
• @bbodenmiller made their first contribution in https://github.com/oxsecurity/megalinter/pull/7192

Full Changelog: https://github.com/oxsecurity/megalinter/compare/v9.3.0...v9.4.0