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CVE-2026-94571
9.4 CRITICAL
- CVSS version (CVSS): 4.0
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Attack Requirement (AT): None (N)
- Privileges Required (PR): Low (L)
- User Interaction (UI): None (N)
- Vulnerable System Impact Confidentiality (VC): High (H)
- Vulnerable System Impact Integrity (VI): High (H)
- Vulnerable System Impact Availability (VA): High (H)
- Subsequent System Impact Confidentiality (SC): High (H)
- Subsequent System Impact Integrity (SI): High (H)
- Subsequent System Impact Availability (SA): High (H)
- Modified Attack Vector (MAV): Network (N)
- Modified Attack Complexity (MAC): Low (L)
- Modified Attack Requirement (MAT): None (N)
- Modified Privileges Required (MPR): Low (L)
- Modified User Interaction (MUI): None (N)
- Modified Vulnerable System Impact Confidentiality (MVC): High (H)
- Modified Vulnerable System Impact Integrity (MVI): High (H)
- Modified Vulnerable System Impact Availability (MVA): High (H)
- Modified Subsequent System Impact Confidentiality (MSC): High (H)
- Modified Subsequent System Impact Integrity (MSI): High (H)
- Modified Subsequent System Impact Availability (MSA): High (H)
- Safety (S): Not Defined (X)
- Automatable (AU): Not Defined (X)
- Recovery (R): Not Defined (X)
- Value Density (V): Not Defined (X)
- Vulnerability Response Effort (RE): Not Defined (X)
- Provider Urgency (U): Not Defined (X)
- Confidentiality Req. (CR): Not Defined (X)
- Integrity Req. (IR): Not Defined (X)
- Availability Req. (AR): Not Defined (X)
- Exploit Maturity (E): Not Defined (X)
by @LeSuisse Activity log
- Created suggestion
- @LeSuisse dismissed (not in Nixpkgs)
In OpenStack Octavia before 18.0.1, the Amphora provider driver did …
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.
References
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https://bugs.launchpad.net/octavia/+bug/2162103 issue-tracking
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https://bugs.launchpad.net/octavia/+bug/2167565 issue-tracking
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https://bugs.debian.org/1148175 issue-tracking
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https://security.openstack.org/ossa/OSSA-2026-039.html vendor-advisory
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https://openwall.com/lists/oss-security/2026/09/21/6 mailing-list
Affected products
Octavia
- <18.0.1
- <16.1.0
- <17.0.1
Matching in nixpkgs
pkgs.python313Packages.python-octaviaclient
OpenStack Octavia Command-line Client
pkgs.python314Packages.python-octaviaclient
OpenStack Octavia Command-line Client
Package maintainers
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@anthonyroussel Anthony Roussel <anthony@roussel.dev>
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@SuperSandro2000 Sandro Jäckel <sandro.jaeckel@gmail.com>
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@vinetos vinetos <contact+git@vinetos.fr>