CVE-2026-94572
CriticalCVSS 9.4Summary
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, allowing an authenticated project member who owns a TLS-enabled load balancer to embed a newline and inject arbitrary HAProxy configuration directives.
Risk Assessment
An authenticated project member can inject arbitrary directives into the HAProxy configuration, potentially leading to traffic interception, security bypass, or further escalation within the cloud environment. Only deployments using the Amphora provider are affected.
Recommendation
Upgrade OpenStack Octavia to version 18.0.1 or later. Until patched, restrict permissions for creating and modifying TLS-enabled load balancers and monitor HAProxy configurations for unexpected directives.
Other vulnerabilities in OpenStack Octavia
See all- CVE-2026-94571Critical
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, so newlines passed structural checks, but Octavia stored and wrote the raw unencoded value directly into the HAProxy configuration generated on the amphora.
- CVE-2026-74248Medium
OpenStack Octavia through 18.0.0 mishandles QoS policy authorization. By associating another project's QoS policy with an amphora, an authenticated user may prevent deletion of that policy.
Original NVD description (English source)
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.