Published 10 Jul, 2026 under Release Notes

We just pushed ESLint v9.39.5, which is a patch release upgrade of ESLint. This release fixes several bugs found in the previous release.

Highlights

This release backports a fix originally released in v10.3.0 that prevents ESLint from crashing in host environments where require.cache is unavailable, such as Yarn Plug’n’Play.

Bug Fixes

• 253be16 fix: handle unavailable require cache (backport of #20812 to v9.x) (#21065) (Eric)

Documentation

• 74930ed docs: switch build to Node.js 24 (#20894) (Milos Djermanovic)
• eaec8bb docs: Add ESLint v9.x EOL notice (#20828) (Milos Djermanovic)

Chores

• 458205f chore: update @eslint/eslintrc and @eslint/js for v9.39.5 (#21077) (Francesco Trotta)
• 202117b chore: package.json update for @eslint/js release (Jenkins)
• d9eb6ed test: disable warning for vm.constants.USE_MAIN_CONTEXT_DEFAULT_LOADER (#21074) (Francesco Trotta)
• 7b431a7 chore: override re2 dependency for @metascraper/helpers (#21068) (Milos Djermanovic)
• daf7791 chore: pin fflate@0.8.2 (#20895) (Milos Djermanovic)
• daee8ba ci: use pnpm in eslint-flat-config-utils type integration test (#20829) (Milos Djermanovic)
• 116d4be ci: unpin Node.js 25.x in CI (#20619) (Copilot)

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