CVE-2026-115569

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

Published Oct 23, 2026 CVSS 3.1 · 3.3 Low EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-jfwm-3p3c-6hx5 Fallow: Jest and Vitest `projects` entries let an analyzed repository make Fallow read files outside the project root
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Fallow-rs
Fallow-rs fallow
Fallow-rs fallow-cli
Fallow-rs fallow-core
Fallow-rs fallow-node
Vendors & Products Fallow-rs
Fallow-rs fallow
Fallow-rs fallow-cli
Fallow-rs fallow-core
Fallow-rs fallow-node
Type Values Removed Values Added
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.
Title Fallow: Jest and Vitest `projects` entries let an analyzed repository make Fallow read files outside the project root
Weaknesses CWE-22
CWE-59
References
Metrics cvssV3_1

{'score': 3.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Oct 30, 2026, 7:18 PM
Reserved
Oct 22, 2026, 10:53 PM
Status
Deferred
Published
Oct 23, 2026, 7:17 PM
Modified
Oct 30, 2026, 8:17 PM