Vulnerability Report

CVE-2025-59465

Title: DoS in Node.js HTTP/2 due to Malformed Headers

DoS

Proof Of Concept

No public PoC currently indexed for CVE-2025-59465.

CWE Category NVD-CWE-noinfo

Published Date Jan 20, 2026

Modified Date Jan 30, 2026

Exploit Status Not Found

Score 7.5 CVSS v3.0

Exploit Probability (EPSS)

0.11%

Vulnerability Summary

CVE-2025-59465: 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) }) }) ```

Impacted Vendors

nodejs 1

joyent 1

Reference Links

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

CVSS v3.0

Source Entity [email protected]

Severity HIGH

7.5

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns