CVE-2026-93564

HIGH 7.5

Io.netty/netty-codec-haproxy: netty: haproxy proxy-v2 nested-tlv grandchild bytebuf reference-count leak (incomplete fix of pr #16881)

CVSS Score

7.5

EPSS Score

0.9%

EPSS Percentile

59th

A flaw was found in Netty. A reference-count leak in the HAProxy PROXY-v2 message decoder allows a remote, unauthenticated attacker to send specially crafted PROXY-protocol v2 headers. This can lead to memory exhaustion, resulting in a Denial of Service (DoS) for the affected system.

CWE	CWE-1035
Vendor	red hat
Product	red hat build of apache camel 3.33.3.sp2
Published	Sep 18, 2026
Last Updated	Oct 15, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

Red Hat / Red Hat Build of Apache Camel 3.33.3.SP2

All versions affected

Red Hat / Red Hat Build of Debezium 3.6

All versions affected

Red Hat / Red Hat build of Quarkus 3.27.5.SP2

All versions affected

Red Hat / Red Hat build of Quarkus 3.33.3.SP2

All versions affected

Red Hat / Red Hat AMQ Broker 7

All versions affected

Red Hat / Red Hat build of Apache Camel 4 for Quarkus 3

All versions affected

Red Hat / Red Hat build of Apache Camel for Spring Boot 4

All versions affected

Red Hat / Red Hat build of Apicurio Registry 3

All versions affected

Red Hat / Red Hat Build of Keycloak

All versions affected

Red Hat / Red Hat Fuse 7

All versions affected

Red Hat / Red Hat JBoss Enterprise Application Platform 7

All versions affected

Red Hat / Red Hat Single Sign-On 7

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

access.redhat.com: https://access.redhat.com/errata/RHSA-2026:69440 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:69470 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:70257 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:83612 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-93564 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2536953