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netty

Netty QUIC versions prior to 4.2.15.Final expose the stateless reset token on the network path when using default HMAC-based connection-ID and stateless-reset-token generators. This exposure allows an on-path attacker to derive the reset token from QUIC headers after a source connection ID rotation and potentially perform a Denial of Service by sending spoofed Stateless Reset packets. The issue is fixed in version 4.2.15.Final.

Netty is a network application framework used for protocol servers and clients. In versions before 4.2.15.Final, the QUIC implementation exposes the stateless reset token on the network path due to the use of default HMAC-based connection-ID and stateless-reset-token generators. Specifically, the reset token for the server's current source connection ID can be derived from bytes appearing as the connection ID in QUIC headers after a source-CID rotation. An attacker positioned on the network path can observe these headers and use the derived token to send spoofed Stateless Reset packets, causing a Denial of Service. The vulnerability is addressed in Netty version 4.2.15.Final.

Netty QUIC versions prior to 4.2.15.Final expose the stateless reset token on the network path when using default HMAC-based connection-ID and stateless-reset-token generators. This exposure allows an on-path attacker to derive the reset token from QUIC headers after a source connection ID rotation 

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… (CVE-2026-50009)

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