Echo: io.netty:netty-codec-classes-quic: security update to 4.2.15.Final

high Tenable Self-Hosted Container Security Plugin ID 458822

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

- Netty is a network application framework for development of protocol servers and clients.
NoQuicTokenHandler is the tokenHandler used when the application does not set one. Prior to version
4.2.15.Final, its writeToken() returns false (server will not send Retry — acceptable), but
validateToken() unconditionally `return 0`. In QuicheQuicServerCodec.handlePacket(), a non-negative return
from validateToken() is interpreted as 'token is valid, ODCID starts at offset 0', causing the server to
call quiche_accept as if the client's address had been validated by a Retry round-trip. Per RFC 9000 §8.1,
a validated address lifts the 3× anti-amplification send limit. Thus any attacker who includes ANY non-
empty token bytes in an Initial packet — with a spoofed victim source IP — causes the Netty server to
treat the victim as validated and reflect full-size handshake flights (certificates, etc.) toward it
without the 3× cap. The correct 'no token handler' semantics would be to return -1 (invalid) so the normal
un-validated path and amplification limit apply. Version 4.2.15.Final patches the issue. (CVE-2026-44894)

Solution

Update the io.netty:netty-codec-classes-quic library and its related packages to version 4.2.15.Final or later.

Plugin Details

Severity: High

ID: 458822

Version: Revision 1.1

Type: Local

Family: Echo Local Security Checks

Published: 10/2/2026

Updated: 10/5/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.73

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:N

CVSS Score Source: CVE-2026-44894

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 6/8/2026

Reference Information

CVE: CVE-2026-44894

Detections

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