---
id: CVE-2026-94572
title: >-
  In OpenStack Octavia before 18.0.1, the Amphora provider driver did not
  validate the listener and pool tls_ciphers field for control characters
summary: >-
  In OpenStack Octavia before 18.0.1, the Amphora provider driver did not
  validate the listener and pool tls_ciphers field for control characters. The
  value is written verbatim into the HAProxy configuration generated on the
  amphora, and t…
severity: critical
cvss: 9.4
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'
cwe:
  - CWE-94
vendor: OpenStack
product: Octavia
affected:
  - Octavia >= 6.0.0 < 16.1.0
  - Octavia >= 17.0.0 < 17.0.1
  - Octavia >= 18.0.0 < 18.0.1
published: '2026-09-21'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T19:56:19.073'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-94572'
references:
  - url: 'https://bugs.debian.org/1148175'
    label: cve@mitre.org
  - url: 'https://bugs.launchpad.net/octavia/+bug/2162101'
    label: cve@mitre.org
  - url: 'https://bugs.launchpad.net/octavia/+bug/2167565'
    label: cve@mitre.org
  - url: >-
      https://opendev.org/openstack/octavia/commit/cad62902e4984a46ad80cbfa943e90006d8d599d
    label: cve@mitre.org
  - url: 'https://openwall.com/lists/oss-security/2026/09/21/6'
    label: cve@mitre.org
  - url: 'https://security.openstack.org/ossa/OSSA-2026-039.html'
    label: cve@mitre.org
tags:
  - nvd
  - cve.org
epss: 0.00332
epssPercentile: 0.2659
cvssSource: cna
ingestedAt: '2026-09-21T20:52:58.302Z'
---

## Overview

In OpenStack Octavia before 18.0.1, the Amphora provider driver did not validate the listener and pool tls_ciphers field for control characters. The value is written verbatim into the HAProxy configuration generated on the amphora, and thus an authenticated project member who owns a TLS-enabled load balancer can embed a newline and inject arbitrary HAProxy configuration directives. Only deployments using the Amphora provider are affected.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.