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[ CVE-2026-115569 · Published 23 Oct 2026 ]

Fallow: Jest and Vitest `projects` entries let an analyzed repository make Fallow read files outside the project root

CVSS 3.3 EPSS <1%Fix available

[ Description ]Official description

Fallow is a codebase intelligence tool for TypeScript and JavaScript. From 2.68.0 until 3.34.0, Fallow follows attacker-controlled Jest projects paths outside the project root through absolute paths, parent segments, dot-prefixed wildcard globs, or symlinks. In version 3.33.1, the same behavior also affects Vitest test.projects paths, Vitest inline-project extends paths, and symlinked script --config paths. Fallow parses the outside files as test-runner configuration and uses them to credit dependencies, setup files, and JSX import sources, which can change unused dependency and unused file findings in CI or agent analysis. The outside file contents are not printed or sent over the network. This issue is fixed in version 3.34.0.

[ Fixes ]Fixes and patches

  • fallow 3.34.0Fixed version · GitHub Advisories · npm package fallow: upgrade to 3.34.0 or later (affected >= 2.68.0, < 3.34.0)
  • @fallow-cli/fallow-node 3.34.0Fixed version · GitHub Advisories · npm package @fallow-cli/fallow-node: upgrade to 3.34.0 or later (affected >= 2.68.0, < 3.34.0)
  • fallow-cli 3.34.0Fixed version · GitHub Advisories · rust package fallow-cli: upgrade to 3.34.0 or later (affected >= 2.68.0, < 3.34.0)
  • fallow-core 3.34.0Fixed version · GitHub Advisories · rust package fallow-core: upgrade to 3.34.0 or later (affected >= 2.68.0, < 3.34.0)

[ Packages ]Affected open-source packages

[ References ]References