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CVE-2026-50009GHSA-CQ4Q-CV5G-R8Q5

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 4.2.15.Final
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • netty netty

    From 4.2.0.Final · fixed in 4.2.15.Final

  • io.netty:netty-codec-classes-quicMaven

    From 4.2.0.Final · fixed in 4.2.15.Final

References 2

GitHub · netty/netty