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Vulnerability · Published Sep 21, 2026 · Assigned by mitre

CVE-2026-94572

Critical 9.4

In plain English

A critical-severity code injection in Octavia from OpenStack. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)9.4Critical
Exploit odds (30 days)0.5%top 54.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12octaviano fix listedDEBIAN-CVE-2026-94572
Debian:13octaviano fix listedDEBIAN-CVE-2026-94572
Debian:14octavia18.0.0-4DEBIAN-CVE-2026-94572
Ubuntu:22.04:LTSoctavia1:10.1.1-0ubuntu1.5UBUNTU-CVE-2026-94572
Ubuntu:22.04:LTSoctavia1:10.1.1-0ubuntu1.5USN-8814-1
Ubuntu:24.04:LTSoctavia1:14.0.0-0ubuntu1.6USN-8814-1
Ubuntu:24.04:LTSoctavia1:14.0.0-0ubuntu1.6UBUNTU-CVE-2026-94572
Ubuntu:26.04:LTSoctavia1:18.0.0-0ubuntu2.1USN-8814-1
Ubuntu:26.04:LTSoctavia1:18.0.0-0ubuntu2.1UBUNTU-CVE-2026-94572

Affected products (as reported)

VendorProductVersions
OpenStack Octavia 6.0.0 – before 16.1.017.0.0 – before 17.0.118.0.0 – before 18.0.1

Weakness: CWE-94 · Vector: 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

References