CVE-2026-94571
Publication date 22 September 2026
Last updated 22 September 2026
Ubuntu priority
Description
In OpenStack Octavia before 18.0.1, the Amphora provider driver did not reject control characters in the L7 policy redirect_url and redirect_prefix fields. The RFC 3986 URL validator percent-encodes control characters before validating, and thus newlines passed structural checks, but Octavia stored and wrote the raw unencoded value directly into the HAProxy configuration generated on the amphora. An authenticated project member who owns a load balancer can therefore inject arbitrary HAProxy directives through a REDIRECT_TO_URL L7 policy. Only deployments using the Amphora provider are affected.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| octavia | 26.04 LTS resolute |
Needs evaluation
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 20.04 LTS focal |
Needs evaluation
|
Severity score breakdown
CVSS version: CVSS v4.0
Base score
9.4 · Critical
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
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-94571
- https://bugs.launchpad.net/octavia/+bug/2167565
- https://bugs.launchpad.net/octavia/+bug/2162101
- https://bugs.launchpad.net/octavia/+bug/2162103
- https://security.openstack.org/ossa/OSSA-2026-039.html
- https://opendev.org/openstack/octavia/commit/cad62902e4984a46ad80cbfa943e90006d8d599d
- https://bugs.debian.org/1148175
- https://opendev.org/openstack/octavia/commit/bad7074621562d90a38be4639c1ab3e245f5bf39
- https://openwall.com/lists/oss-security/2026/09/21/6