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CVE-2026-50009

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-50009

Severity

4.8

Medium

CVSS V3

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Summary

Netty QUIC stateless reset token material exposed through header-visible connection IDs

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.

References

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