PT-2026-48901 · Netty · Netty

Published 2026-06-12 · Updated 2026-06-12 · CVE-2026-50009

Mitre

CVSS v3.1

4.8

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L

Netty is a network application framework for development of protocol servers and clients. Prior to version 4.2.15.Final, Netty QUIC exposes the stateless reset token on the network path when using the default HMAC-based connection-ID and stateless-reset-token generators. The reset token for the server's current source connection ID can be derived from bytes that appear as the connection ID in QUIC headers after a source-CID rotation. An on-path attacker observing the headers can use the token to perform a Denial of Service by sending a spoofed Stateless Reset packet. Version 4.2.15.Final patches the issue.

Fix

Information Disclosure

Use of Insufficiently Random Values

Weakness Enumeration

CWE-200

CWE-330

Related Identifiers

CVE-2026-50009

Affected Products

Netty

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-50009 · Security Note
• https://github.com/netty/netty/releases/tag/netty-4.2.15.Final · Note
• https://github.com/netty/netty/security/advisories/GHSA-cq4q-cv5g-r8q5 · Note