CVE-2025-59464
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability19. percentile0.3%
Product
Nodejs Node.js
PublishedJan 20, 2026
First seenJan 20, 2026
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- nodejs node.js24.12.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nodejs node.js | 24.0.0 ≤ v < 24.12.0 | 24.12.0 |
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