CVE-2025-9308: Yarnpkg Yarn

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

A vulnerability has been found in yarnpkg Yarn up to 1.22.22. This impacts the function setOptions of the file src/util/request-manager.js. Such manipulation leads to inefficient regular expression complexity. Local access is required to approach this attack. This vulnerability only affects products that are no longer supported by the maintainer.

Affected products

• Yarnpkg Yarn: up to and including 1.22.22

Published 2025-08-21. Last modified 2026-06-17.