CVE-2019-10773: Yarnpkg Yarn

High severity, CVSS 7.8. EPSS: 1.5% chance of exploitation in the next 30 days.

In Yarn before 1.21.1, the package install functionality can be abused to generate arbitrary symlinks on the host filesystem by using specially crafted "bin" keys. Existing files could be overwritten depending on the current user permission set.

Affected products

• Yarnpkg Yarn: before 1.21.1 (fixed in 1.21.1)

Published 2019-12-16. Last modified 2026-06-17.