CVE-2026-94572

critical

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.

References

https://security.openstack.org/ossa/OSSA-2026-039.html

https://openwall.com/lists/oss-security/2026/09/21/6

https://opendev.org/openstack/octavia/commit/cad62902e4984a46ad80cbfa943e90006d8d599d

https://bugs.launchpad.net/octavia/+bug/2167565

https://bugs.launchpad.net/octavia/+bug/2162101

https://bugs.debian.org/1148175

Details

Source: Mitre, NVD

Published: 2026-09-21

Updated: 2026-09-22

Risk Information

CVSS v2

Base Score: 3.5

Vector: CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N

Severity: Low

CVSS v3

Base Score: 8.1

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

Severity: High

CVSS v4

Base Score: 9.4

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

Severity: Critical

EPSS

EPSS: 0.00332