How severe is CVE-2025-59464?

CVE-2025-59464 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-59464 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-59464?

CVE-2025-59464 affects Nodejs Node.js. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-59464?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-59464 have an EU (EUVD) identifier?

Yes. CVE-2025-59464 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3340.

When was CVE-2025-59464 published?

CVE-2025-59464 was published on 2026-01-20 and last updated on 2026-06-17.

CVE-2025-59464

CVE-2025-59464 is a high-severity vulnerability in Nodejs Node.js with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-3340
Weakness: CWE-400
Affected product: Nodejs Node.js
Published: 2026-01-20
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-59464?: 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.
How severe is CVE-2025-59464?: CVE-2025-59464 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-59464 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-59464?: CVE-2025-59464 affects Nodejs Node.js. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-59464?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-59464 have an EU (EUVD) identifier?: Yes. CVE-2025-59464 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3340.
When was CVE-2025-59464 published?: CVE-2025-59464 was published on 2026-01-20 and last updated on 2026-06-17.

References

https://nodejs.org/en/blog/vulnerability/december-2025-security-releases

Affected products (1)

cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*

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