CVE-2025-59464: Node.js

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

A memory leak in Node.js’s OpenSSL integration occurs when converting `X.509` certificate fields to UTF-8 without freeing the allocated buffer. When applications call `socket.getPeerCertificate(true)`, each certificate field leaks memory, allowing remote clients to trigger steady memory growth through repeated TLS connections. Over time this can lead to resource exhaustion and denial of service.

Affected products

• Node.js Node.js: from 24.0.0, before 24.12.0 (fixed in 24.12.0)

Published 2026-01-20. Last modified 2026-06-17.