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CVE-2025-59464

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Date: January 20, 2026

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.

Severity Score

Related Resources (4)

https://nvd.nist.gov/vuln/detail/CVE-2025-59464
https://nodejs.org/en/blog/vulnerability/december-2025-security-releases
https://nodejs.org/en/blog/vulnerability/december-2025-security-releases#timeout-based-race-conditions-make-uint8arraybufferalloc-non-zerofilled-cve-2025-55131---high
https://www.mend.io/vulnerability-database/CVE-2025-59464

Severity Score

Weakness Type (CWE)

Uncontrolled Resource Consumption

CWE-400

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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