CVE-2025-59465
HIGHNode.js 20.0.0-20.19.1 - Denial of Service via Malformed HTTP/2 HEADERS Frame
Title source: llmDescription
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) }) }) ```
References (1)
Core 1
Core References
Release Notes, Vendor Advisory
https://nodejs.org/en/blog/vulnerability/december-2025-security-releases
Scores
CVSS v3
7.5
EPSS
0.0093
EPSS Percentile
55.8%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-400
Status
published
Products (1)
nodejs/node.js
20.0.0 - 20.20.0
Published
Jan 20, 2026
Tracked Since
Feb 18, 2026