CVE-2026-93575

Summary

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.

Affected Software

Weaknesses

• CWE-1035: CWE-1035

Workarounds

See https://github.com/netty/netty/security/advisories/GHSA-jqf3-r9ww-c5x8 for fixed versions and remediation guidance.

References

• https://access.redhat.com/security/cve/CVE-2026-93575
• https://bugzilla.redhat.com/show_bug.cgi?id=2536967

• ←Previous
• Next→