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CVE-2025-59465

7.5 · HIGH

A malformed `HTTP/2 HEADERS` frame with oversized, invalid `HPACK` data can cause Node.js to crash by triggering an unhandled `TLSSocket` error `ECONNRESET`.

Published Jan 20, 2026CWE-400EPSS 3.96%

Overview

CVE-2025-59465 is a high-severity vulnerability. It was published on January 20, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A malformed `HTTP/2 HEADERS` frame with oversized, invalid `HPACK` data can cause Node.js to crash by triggering an unhandled `TLSSocket` error `ECONNRESET`. Instead of safely closing the connection, the process crashes, enabling a remote denial of service. This primarily affects applications that do not attach explicit error handlers to secure sockets, for example:

```

server.on('secureConnection', socket => {

socket.on('error', err => {

console.log(err)

})

})

```

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refnodejs.org/en/blog/vulnerability/december-2025-security-releasesRefaccess.redhat.com/errata/RHSA-2026:1842Refaccess.redhat.com/errata/RHSA-2026:1843Refaccess.redhat.com/errata/RHSA-2026:2420Refaccess.redhat.com/errata/RHSA-2026:2421Refaccess.redhat.com/errata/RHSA-2026:2422Refaccess.redhat.com/errata/RHSA-2026:2767Refaccess.redhat.com/errata/RHSA-2026:2768Refaccess.redhat.com/errata/RHSA-2026:2781Refaccess.redhat.com/errata/RHSA-2026:2782

How CyberStrike helps

Frequently asked questions

What is CVE-2025-59465?

CVE-2025-59465 is a high-severity vulnerability. It was published on January 20, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-59465?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-59465?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-59465?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-59465 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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