OpenStack Octavia up to 16.0.x/17.0.0/18.0.0 Amphora provider driver redirect_url/redirect_prefix code injection

Summaryinfo

A vulnerability was found in OpenStack Octavia up to 16.0.x/17.0.0/18.0.0 and classified as very critical. This issue affects some unknown processing of the component Amphora provider driver. The manipulation of the argument redirect_url/redirect_prefix results in code injection. This vulnerability was named CVE-2026-94571. The attack may be performed from remote. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical has been found in OpenStack Octavia up to 16.0.x/17.0.0/18.0.0. Affected is an unknown code of the component Amphora provider driver. The manipulation of the argument redirect_url/redirect_prefix with an unknown input leads to a code injection vulnerability. CWE is classifying the issue as CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at bugs.launchpad.net. This vulnerability is traded as CVE-2026-94571 since 09/21/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/21/2026). This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

Upgrading to version 16.1.0, 17.0.1 or 18.0.1 eliminates this vulnerability.

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Productinfo

Type

• Cloud Software

Vendor

• OpenStack

Name

• Octavia

Version

• 16.0
• 17.0
• 18.0

License

• free

Website

• Vendor: https://www.openstack.org/

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