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CVE-2026-94571

In OpenStack Octavia before 18.0.1, the Amphora provider driver did not reject control characters...

9.4 CriticalFix available

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 profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.53%Up 0.2 points since Sep 22, 2026
90%50%10%1%

What each source reports

CVE List Score used 9.4

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.

Record
CVE-2026-94571
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Weakness
CWE-94
Updated
2026-11-02
EUVDEUVD-2026-84116 9.4

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.

Record
EUVD-2026-84116
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-33h9-ppgm-5785 9.4

In OpenStack Octavia before 18.0.1, the Amphora provider driver did not reject control characters...

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.

Record
GHSA-33h9-ppgm-5785
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness
CWE-94
Updated
2026-11-02
NVD 9.4

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.

Record
CVE-2026-94571
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness
CWE-94
Updated
2026-11-02
OSV 9.4

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.

Record
CVE-2026-94571
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Weakness
CWE-94
Updated
2026-11-02
OSVDEBIAN-CVE-2026-94571 9.4

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.

Record
DEBIAN-CVE-2026-94571
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated
2026-11-02
OSVUBUNTU-CVE-2026-94571 9.4

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.

Record
UBUNTU-CVE-2026-94571
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Updated
2026-11-02
OSVUSN-8814-1 No score

octavia vulnerabilities

It was discovered that Octavia did not properly validate TLS cipher string fields in the Amphora provider driver. An authenticated attacker who owns a TLS-enabled load balancer could possibly use this issue to inject arbitrary HAProxy configuration directives. (CVE-2026-94572)

It was discovered that Octavia did not properly validate L7 policy redirect URL fields in the Amphora provider driver. An authenticated attacker who owns a load balancer could possibly use this issue to inject arbitrary HAProxy configuration directives. (CVE-2026-94571)

It was discovered that Octavia incorrectly handled quality of service policy authorization. An authenticated attacker could possibly use this issue to prevent deletion of another project's QoS policy. (CVE-2026-74248)

Record
USN-8814-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
octavia
Debian:12
All versions, plus listed versions
11.0.0-212.0.0-112.0.0-212.0.0-312.0.0-4
Show 38 moreShow less
12.0.0~rc1-112.0.0~rc2-113.0.0-113.0.0-213.0.0~rc1-114.0.0-114.0.0-214.0.0-314.0.0-414.0.0~rc1-115.0.0-115.0.0-215.0.0-315.0.0~rc1-115.0.0~rc1-215.0.0~rc1-316.0.0-116.0.0-216.0.0-316.0.0~rc1-116.0.0~rc1-217.0.0-117.0.0-217.0.0-317.0.0-417.0.0-517.0.0~rc1-117.0.0~rc2-117.0.0~rc2-217.0.0~rc2-318.0.0-118.0.0-218.0.0-318.0.0-418.0.0~rc1-118.0.0~rc1-219.0.0~rc1-119.0.0~rc1-2
None known
octavia
Debian:13
All versions, plus listed versions
16.0.0-216.0.0-317.0.0-117.0.0-217.0.0-3
Show 14 moreShow less
17.0.0-417.0.0-517.0.0~rc1-117.0.0~rc2-117.0.0~rc2-217.0.0~rc2-318.0.0-118.0.0-218.0.0-318.0.0-418.0.0~rc1-118.0.0~rc1-219.0.0~rc1-119.0.0~rc1-2
None known
octavia
Debian:14
before 18.0.0-4, plus listed versions
16.0.0-216.0.0-317.0.0-117.0.0-217.0.0-3
Show 11 moreShow less
17.0.0-417.0.0-517.0.0~rc1-117.0.0~rc2-117.0.0~rc2-217.0.0~rc2-318.0.0-118.0.0-218.0.0-318.0.0~rc1-118.0.0~rc1-2
18.0.0-4
octavia
Ubuntu:20.04:LTS
All versions, plus listed versions
5.0.0-0ubuntu16.0.0~b1~git2019121614.45cb1e4e-0ubuntu16.0.0~b2~git2020020614.005cd1e6-0ubuntu16.0.0~b2~git2020020614.005cd1e6-0ubuntu26.0.0~b3~git2020032609.73fca169-0ubuntu1
Show 9 moreShow less
6.0.0~b3~git2020041014.771a5d87-0ubuntu16.0.0-0ubuntu0.20.04.16.0.0-0ubuntu0.20.04.26.1.0-0ubuntu16.2.0-0ubuntu16.2.1-0ubuntu16.2.1-0ubuntu26.2.2-0ubuntu16.2.2-0ubuntu1.1
None known
octavia
Ubuntu:22.04:LTS
before 1:10.1.1-0ubuntu1.5, plus listed versions
1:9.0.0-0ubuntu11:9.0.0+git2021120816.ab3c3ef7-0ubuntu11:9.0.1+git2022011217.27e5b27d-0ubuntu11:9.0.1+git2022030314.328ffbab-0ubuntu11:10.0.0-0ubuntu1
Show 6 moreShow less
1:10.1.0-0ubuntu11:10.1.1-0ubuntu11:10.1.1-0ubuntu1.11:10.1.1-0ubuntu1.21:10.1.1-0ubuntu1.31:10.1.1-0ubuntu1.4
1:10.1.1-0ubuntu1.5
octavia
Ubuntu:24.04:LTS
before 1:14.0.0-0ubuntu1.6, plus listed versions
1:13.0.0-0ubuntu11:13.0.0+git2024011917.5750e451-0ubuntu11:14.0.0~rc1-0ubuntu11:14.0.0-0ubuntu11:14.0.0-0ubuntu1.1
Show 4 moreShow less
1:14.0.0-0ubuntu1.21:14.0.0-0ubuntu1.31:14.0.0-0ubuntu1.41:14.0.0-0ubuntu1.5
1:14.0.0-0ubuntu1.6
octavia
Ubuntu:26.04:LTS
before 1:18.0.0-0ubuntu2.1, plus listed versions
1:17.0.0-0ubuntu11:17.0.0+git20260116.e805a93-0ubuntu11:18.0.0~rc1-0ubuntu21:18.0.0-0ubuntu11:18.0.0-0ubuntu2
1:18.0.0-0ubuntu2.1
octavia
Ubuntu:22.04:LTS
From an advisory covering 3 CVEs
before 1:10.1.1-0ubuntu1.5, plus listed versions
1:9.0.0-0ubuntu11:9.0.0+git2021120816.ab3c3ef7-0ubuntu11:9.0.1+git2022011217.27e5b27d-0ubuntu11:9.0.1+git2022030314.328ffbab-0ubuntu11:10.0.0-0ubuntu1
Show 6 moreShow less
1:10.1.0-0ubuntu11:10.1.1-0ubuntu11:10.1.1-0ubuntu1.11:10.1.1-0ubuntu1.21:10.1.1-0ubuntu1.31:10.1.1-0ubuntu1.4
1:10.1.1-0ubuntu1.5
octavia
Ubuntu:24.04:LTS
From an advisory covering 3 CVEs
before 1:14.0.0-0ubuntu1.6, plus listed versions
1:13.0.0-0ubuntu11:13.0.0+git2024011917.5750e451-0ubuntu11:14.0.0~rc1-0ubuntu11:14.0.0-0ubuntu11:14.0.0-0ubuntu1.1
Show 4 moreShow less
1:14.0.0-0ubuntu1.21:14.0.0-0ubuntu1.31:14.0.0-0ubuntu1.41:14.0.0-0ubuntu1.5
1:14.0.0-0ubuntu1.6
octavia
Ubuntu:26.04:LTS
From an advisory covering 3 CVEs
before 1:18.0.0-0ubuntu2.1, plus listed versions
1:17.0.0-0ubuntu11:17.0.0+git20260116.e805a93-0ubuntu11:18.0.0~rc1-0ubuntu21:18.0.0-0ubuntu11:18.0.0-0ubuntu2
1:18.0.0-0ubuntu2.1

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-94571 is a critical vulnerability (CVSS 9.4) in Openstack Octavia, published September 21, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.53%, the 45th percentile. Fixed in octavia 18.0.0-4.

References

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