CVE-2025-59465

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) }) }) ```

How to fix CVE-2025-59465

To remediate CVE-2025-59465, upgrade the affected package to a fixed version below.

—upgrade to 22.22.2-r0 or later
—upgrade to 20.20.0 or later
—upgrade to 20.20.0 or later
—upgrade to 12.22.12~dfsg-1~deb11u8 or later

Is CVE-2025-59465 being exploited?

Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.

Affected packages (4)

from 0, < 22.22.2-r0
from 0, < 20.20.0, >= 21.0.0, < 22.22.0, >= 23.0.0, < 24.13.0, >= 25.0.0, < 25.3.0
from 0, < 20.20.0, >= 21.0.0, < 22.22.0, >= 23.0.0, < 24.13.0, >= 25.0.0, < 25.3.0
from 0, < 12.22.12~dfsg-1~deb11u8

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	HIGH7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H