CVE-2025-59464Network attack vector

Remote service interruption via certificate-field memory leak

Published Jan 20, 2026 · Updated Jan 20, 2026

Memory leakage in Node.js 24.x before 24.12.0 allows remote attackers to exhaust TLS service memory through repeated connections. The OpenSSL certificate-field conversion path allocates UTF-8 buffers without freeing them when socket.getPeerCertificate(true) requests detailed X.509 data. Exposure requires an application to invoke that detailed peer-certificate path; repeated TLS clients then cause steady memory growth and eventual service interruption.

CVSS severity7.5
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leakage in Node.js 24.x before 24.12.0 allows remote attackers to exhaust TLS service memory through repeated connections. The OpenSSL certificate-field conversion path allocates UTF-8 buffers without freeing them when socket.getPeerCertificate(true) requests detailed X.509 data. Exposure requires an application to invoke that detailed peer-certificate path; repeated TLS clients then cause steady memory growth and eventual service interruption.

The record

CVE
CVE-2025-59464
Published
Jan 20, 2026
Updated
Jan 20, 2026
Vendor
Node.js
Product
Node.js
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=24.12.0 <24.12.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Node.js · Node.jsversion=24.12.0 <24.12.0

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.5HackerOneCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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