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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 3
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Openstack Octavia
cpe:2.3:a:openstack:octavia:*:*:*:*:*:*:*:*
|
0.8.0
|
16.1.0
|
|
Openstack Octavia
cpe:2.3:a:openstack:octavia:*:*:*:*:*:*:*:*
|
17.0.0
|
17.0.1
|
|
Openstack Octavia
cpe:2.3:a:openstack:octavia:*:*:*:*:*:*:*:*
|
18.0.0
|
18.0.1
|
References 6
https://bugs.launchpad.net/octavia/+bug/2162103
NVD
https://bugs.launchpad.net/octavia/+bug/2167565
NVD
https://bugs.debian.org/1148175
NVD
https://opendev.org/openstack/octavia/commit/bad7074621562d90a38be4639c1ab3e245…
NVD
https://security.openstack.org/ossa/OSSA-2026-039.html
NVD
https://openwall.com/lists/oss-security/2026/09/21/6
NVD