---
title: "CVE-2026-93564: HAProxy - Resource Leak"
description: "HAProxy contains a PROXY-v2 nested-TLV grandchild ByteBuf reference-count leak caused by incomplete fix of PR #16881, letting attackers cause resource leaks, exploit requires crafted PROXY-v2 nested-TLV packets."
url: https://panop.io/threat-heartbeat/CVE-2026-93564/
---

# CVE-2026-93564 HAProxy - Resource Leak

HAProxy contains a PROXY-v2 nested-TLV grandchild ByteBuf reference-count leak caused by incomplete fix of PR #16881, letting attackers cause resource leaks, exploit requires crafted PROXY-v2 nested-TLV packets.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.89% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-93564)

## Details

Type

Resource Leak

Impact

Denial Of Service

CVSS vector

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

Published

18 September 2026

Updated

15 October 2026

Weakness

[CWE-1035](https://cwe.mitre.org/data/definitions/1035.html)

## Vendor fix

Update to the latest version with the complete fix for PR #16881.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-93564](https://nvd.nist.gov/vuln/detail/CVE-2026-93564)
- [https://access.redhat.com/security/cve/CVE-2026-93564](https://access.redhat.com/security/cve/CVE-2026-93564)
- [https://bugzilla.redhat.com/show\_bug.cgi?id=2536953](https://bugzilla.redhat.com/show_bug.cgi?id=2536953)
- [https://access.redhat.com/errata/RHSA-2026:69470](https://access.redhat.com/errata/RHSA-2026:69470)
- [https://access.redhat.com/errata/RHSA-2026:69440](https://access.redhat.com/errata/RHSA-2026:69440)
- [https://access.redhat.com/errata/RHSA-2026:70257](https://access.redhat.com/errata/RHSA-2026:70257)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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