HAProxy PROXY-v2 Vulnerability Related to ByteBuf Reference Count Leak
CVE-2026-93564

7.5HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat AMQ Broker 7
Red Hat Build Of Apache Camel 4 For Quarkus 3
Red Hat Build Of Apache Camel For Spring Boot 4
Red Hat Build Of Apicurio Registry 3
Vendor
CVE Published:
18 September 2026

What is CVE-2026-93564?

The HAProxy PROXY-v2 component is affected by a vulnerability characterized by a nested-TLV grandchild ByteBuf reference-count leak. This issue stems from an incomplete fix applied previously, leaving the system exposed to potential resource management inefficiencies. Administrators should assess their HAProxy configurations and apply any available patches to mitigate risks associated with this vulnerability.

References

https://access.redhat.com/security/cve/CVE-2026-93564
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2536953
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.