CVE-2025-59464
Published: 20 January 2026
Summary
CVE-2025-59464 is a high-severity Uncontrolled Resource Consumption (CWE-400) vulnerability in Nodejs Node.Js. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 16.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Limiting concurrent sessions directly prevents uncontrolled resource consumption by capping the number of active sessions per user or account.
Analysis identifies uncontrolled resource consumption indicative of denial-of-service or abuse attempts.
Contingency plan testing includes resource exhaustion scenarios to verify recovery, making it harder for attackers to sustain exploits that cause uncontrolled consumption.
Updated contingency plans include current procedures to detect, contain, and recover from resource exhaustion, limiting an attacker's ability to sustain impact from uncontrolled consumption.
Alternate site allows resumption of operations if resource exhaustion at the primary site is exploited to cause unavailability.
Alternate telecommunications services enable resumption of essential functions when primary services become unavailable due to uncontrolled resource consumption.
The team can analyze and respond to resource exhaustion incidents, reducing the impact of attacks that exploit uncontrolled consumption weaknesses.
Timely maintenance support and spare parts enable rapid recovery from failures induced by uncontrolled resource consumption, shortening the impact window of denial-of-service attacks.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Direct remote exploitation of public-facing Node.js TLS endpoint for memory exhaustion DoS via repeated connections.
NVD 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…
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connections. Over time this can lead to resource exhaustion and denial of service.
Deeper analysisAI
CVE-2025-59464 is a memory leak vulnerability in Node.js's OpenSSL integration. The issue arises when X.509 certificate fields are converted to UTF-8 without freeing the allocated buffer. This leak occurs each time an application calls socket.getPeerCertificate(true), affecting Node.js applications that process TLS peer certificates.
Remote unauthenticated attackers can exploit this vulnerability by initiating repeated TLS connections to vulnerable Node.js servers. Each connection triggers memory leakage proportional to the certificate fields processed, causing gradual memory growth. Over time, this leads to resource exhaustion and denial-of-service. The vulnerability carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) and maps to CWE-400 (Uncontrolled Resource Consumption).
The Node.js security advisory at https://nodejs.org/en/blog/vulnerability/december-2025-security-releases provides details on patches addressing this issue, published on 2026-01-20.
Details
- CWE(s)