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Ruff 0.17.4 adds security rule, speeds fixes

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Ruff 0.17.4 adds security rule, speeds fixes
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// 1h agoPRODUCT UPDATE

Ruff 0.17.4 adds security rule, speeds fixes

Ruff 0.17.4 adds a preview security rule for unsafe tarfile parsing, alongside autofix safeguards, parser bug fixes, diagnostic improvements, and formatter performance work.

// ANALYSIS

This is a practical hardening release: less about flashy features, more about making Ruff safer and more dependable in automated Python workflows.

  • –Flags `tarfile.open(..., ignore_zeros=True)`, which can relax archive validation and create security risks.
  • –Prevents `flake8-logging-format` fixes from changing behavior or producing invalid syntax.
  • –Fixes a diagnostic-renderer panic on BOM-prefixed files and improves visibility into nonprinting characters.
  • –Optimizes formatting and repeated-dictionary-key checks, benefiting CI, pre-commit hooks, and large codebases.
  • –Preview rules require Ruff’s `--preview` mode, so teams should opt in deliberately before enforcing them.
// TAGS
ruffdevtoolcliopen-sourcesecurity

DISCOVERED

1h ago

2026-11-06

PUBLISHED

19h ago

2026-11-05

RELEVANCE

6/ 10