CVE-2026-59871: Isaacs Tar

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

node-tar is a tar archive manipulation library for Node.js. Prior to 7.5.18, node-tar coerces all-digit PAX path and linkpath values in src/pax.ts to JavaScript numbers, causing downstream path handling such as normalizeWindowsPath(entry.path).split('/') to throw an uncaught TypeError. This issue is fixed in version 7.5.18.

Affected products

• Isaacs Tar: before 7.5.18 (fixed in 7.5.18)

Published 2026-07-08. Last modified 2026-07-10.