CVE-2026-50009
Description
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.
How to fix
- netty netty4.2.15 or later
- io.netty:netty-codec-classes-quic4.2.15.Final or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| netty netty | 4.2.0 ≤ v < 4.2.15 | 4.2.15 |
| io.netty:netty-codec-classes-quicMaven | 4.2.0.Final ≤ v < 4.2.15.Final | 4.2.15.Final |
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Attack Surface Management
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