Affects VMware Avi (widely deployed enterprise load balancer); control‑plane auth bypass can disrupt traffic and configs across organizations.
CVE-2026-47866
Auth bypass in VMware Avi Load Balancer allows unauthorized control‑plane access.
Is CVE-2026-47866 being exploited?
Not confirmed. CVE-2026-47866 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 0.38% probability of exploitation in the next 30 days.
How severe is CVE-2026-47866?
CVE-2026-47866 is rated High with a CVSS score of 8.3. 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-2026-47866?
Yes. A fix has been recorded for CVE-2026-47866. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-47866 affect?
CVE-2026-47866 affects VMware Avi (Avi Vantage / NSX Advanced Load Balancer), 22.1.1 - 22.1.7 (fixed in 30.2.7), 30.1.1 - 30.2.6 (fixed in 30.2.7), 31.1.1 - 31.2.2 (fixed in 31.2.2-2p3), and 1 further product or version. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-47866?
Upgrade to the listed fixed versions and restrict management/control‑plane network access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Network attacker can access parts of the Avi control plane, potentially view/modify LB configs, enumerate services, or disrupt traffic.
Immediate action required
- affected32.1.1
- affected>= 31.1.1 and <= 31.2.2
- affected>= 30.1.1 and <= 30.2.6
- affected>= 22.1.1 and <= 22.1.7
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.