major vulnerability· requires attention

RCE in OpenStack Octavia Amphora affects cloud load balancers used across private/public clouds; compromise can disrupt tenant traffic and cloud infrastructure.

Cloud

CVE-2026-94571

9.4

Critical

EPSS 0.53%Patch available

Auth'd tenant can inject HAProxy directives via Octavia Amphora L7 redirect, enabling RCE.

exploited

No known exploitation not in CISA KEV as of our last sync

fix

Patch available see the advisory in the references

likelihood

EPSS 0.53%top 55% of scored CVEs

Published 21 Sept 2026Analysed here 22 Sept 2026CVSS scored by the publisher (CNA)

common questions

Is CVE-2026-94571 being exploited?

Not confirmed. CVE-2026-94571 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.53% probability of exploitation in the next 30 days.

How severe is CVE-2026-94571?

CVE-2026-94571 is rated Critical with a CVSS score of 9.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.

Is there a patch for CVE-2026-94571?

Yes. A fix has been recorded for CVE-2026-94571. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.

What does CVE-2026-94571 affect?

CVE-2026-94571 affects OpenStack Octavia < 18.0.1 (Amphora provider), Amphora HAProxy-based load balancer VMs, OpenStack deployments using Octavia Amphora. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.

What should I do about CVE-2026-94571?

Upgrade Octavia to 18.0.1+, restrict tenant privileges, audit LB configs

Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.

executive summary

technical analysis

affected

OpenStack Octavia < 18.0.1 (Amphora provider)Amphora HAProxy-based load balancer VMsOpenStack deployments using Octavia Amphora

impact

Authenticated project member can inject arbitrary HAProxy directives via redirect_url/redirect_prefix, leading to remote code execution on Amphora load balancers.

action required

Immediate action required

affected versions

OpenStack Octavia

affected>= 0.8.0 and < 16.1.0
affected>= 17.0.0 and < 17.0.1
affected>= 18.0.0 and < 18.0.1

As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.

cisa ssvc

exploitation: none
automatable: no
technical impact: total

Assessed by CISA 22 Sept 2026 (SSVC 2.0.3).

timeline

21 Sept 2026Published
22 Sept 2026CISA SSVC assessment: exploitation none · 1 day later
22 Sept 2026CVE record last updated · same day later
22 Sept 2026Analysed by vulneraibility.com · same day later

how to fix

Remediation steps are tailored for users whose stack is affected. Add this technology to your stack to see the fix checklist.

references

NVD CVE.org CVE Details Source

6 references in the CVE record: 1 advisory, 1 patch, 4 links

Advisorysecurity.openstack.org /ossa/OSSA-2026-039.html
Patchopendev.org /openstack/octavia/commit/bad7074621562d90a38be4639c1ab3e245f5bf39
Linkbugs.launchpad.net /octavia/+bug/2162103
Linkbugs.launchpad.net /octavia/+bug/2167565
Linkbugs.debian.org /1148175
Linkopenwall.com /lists/oss-security/2026/09/21/6

sources

CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
NVD: CVSS and CPE data
CISA Vulnrichment (ADP): SSVC decision points
FIRST EPSS: exploit probability and percentile
Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.

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