CVE-2026-93575

Io.netty/netty-codec-mqtt: netty: resource exhaustion in mqttdecoder

Published: Sep 18, 2026Updated: Sep 22, 2026 Sources: CVE List NVDCWE-1035

7.5HIGH

Description

A flaw was found in Netty's MqttDecoder. An unauthenticated remote attacker can exploit this vulnerability by sending a specially crafted MQTT CONNECT packet. The decoder fails to properly validate the 'Properties Length' against the 'Remaining Length', allowing an attacker to bypass size limits. This leads to excessive memory and CPU consumption, resulting in a denial of service (DoS) due to an OutOfMemoryError.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:HAvailability

High

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Weaknesses

CWE-1035

Affected Products

Red Hat

commercial·US

Red Hat AMQ Broker 7On-prem

Operating Systems / linux-distro

Red Hat build of Apache Camel for Spring Boot 4LibraryLibrary

OSS Libraries / generic-library

Red Hat Fuse 7On-premDev Tool

DevTools & CI / ci-cd

Red Hat JBoss Enterprise Application Platform 7On-prem

Operating Systems / linux-distro

Red Hat Single Sign-On 7On-premSecurity Product

Security Products / identity-access-mgmt

Exploitability

Workaround Available

Is your org exposed to CVE-2026-93575?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

References

https://access.redhat.com/security/cve/CVE-2026-93575

access.redhat.com

https://bugzilla.redhat.com/show_bug.cgi?id=2536967

bugzilla.redhat.com

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