Avi Load Balancer: Improper Authentication
CVE-2026-47865 is a critical-severity improper authentication vulnerability in Avi Load Balancer from VMware, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Avi Load Balancer versions: 31.1.1 through 31.2.2; 30.1.1 through 30.2.6; 22.1.1 through 22.1.7. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.61% chance of exploitation within 30 days, which is low compared with other CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Vmware Avi Load Balancer to 22.1.7 or 30.2.7 or 31.2.2, whichever matches your release line, or a later version.
- Read the advisory on support.broadcom.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| VMware | Avi Load Balancer | 31.1.1 through 31.2.2; 30.1.1 through 30.2.6; 22.1.1 through 22.1.7 | Not stated |
| Broadcom | Vmware Avi Load Balancer | 22.1.1 up to, but not including, 22.1.7; 30.1.1 up to, but not including, 30.2.7; 31.1.1 up to, but not including, 31.2.2; 22.1.7; 31.2.2; 32.1.1 | 22.1.7, 30.2.7, 31.2.2 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (vmware.com).
Official description
VMware Avi Load Balancer contains an authentication bypass vulnerability. A malicious user with network access may be able to access the Avi Control plane by bypassing the authentication mechanism. Affected versions: 31.1.1 through 31.2.2 (fixed in 31.2.2-2p3) 30.1.1 through 30.2.6 (fixed in 30.2.7) 22.1.1 through 22.1.7 (fixed in 30.2.7)
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
How developers prevent this class of flaw
- Use an authentication framework or library such as the OWASP ESAPI Authentication feature.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in Avi Load Balancer
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
- 7.8 High severity
- 8.8 High severity
- 8.3 High severity
Recent Improper Authentication vulnerabilities
- 8.7 High severity
- 9.6 Critical severity
- 8.1 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.3 Critical severity
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