Riskcovery

CVE-2026-50009

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

State
Published
Severity
4.8 Medium
Published
Jun 12, 2026
Updated
Jun 12, 2026
Reserved
Jun 2, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.14.8 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:LGitHub_M

Weaknesses

  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-330 Use of Insufficiently Random Values

Affected Products

ProductVersions
nettynetty
  • >= 4.2.0.Final, < 4.2.15.FinalAffected

References

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