CVE-2026-50009

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.

CVSS v3 4.8 MEDIUM

4.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/netty/netty/releases/tag/netty-4.2.15.Final	Release Notes
https://github.com/netty/netty/security/advisories/GHSA-cq4q-cv5g-r8q5	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-06-12 16:16

Updated : 2026-06-17 10:57

NVD link : CVE-2026-50009

Mitre link : CVE-2026-50009

CVE.ORG link : CVE-2026-50009

JSON object : View

Products Affected

netty

netty

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

CWE-330

Use of Insufficiently Random Values

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