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7.7
CVE-2026-41012: BOSH Director can be tricked to steal vCenter admin passwords
CVE-2026-41012 · published 5 days ago
Summary
If someone can watch the network traffic between BOSH Director and vCenter, they can pretend to be vCenter and capture the administrator username and password. Those credentials give full control over all virtual machines and storage managed by vCenter. To reduce the risk, use encrypted connections that verify the server’s identity, restrict network access to only trusted hosts, and change any exposed passwords as soon as possible.
What to do
- Update cloud foundry bosh-vsphere-cpi-release to version 98.0.6 or later.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| cloud foundry | bosh-vsphere-cpi-release | < 98.0.6 |
Original advisory text
BOSH vSphere CPI Improper Cert Validation
Traffic interception vulnerability in BOSH Director vCenter CPI allows attackers positioned between BOSH Director and vCenter to impersonate vCenter REST API and capture administrator credentials via HTTP Basic auth, leading to complete virtualization infrastructure takeover.
An attacker who can intercept traffic between the BOSH Director and vCenter can establish a malicious server impersonating the vCenter REST API. When the BOSH Director makes CPI calls to perform routine cloud infrastructure operations, the attacker captures the vCenter administrator username and password transmitted via HTTP Basic authentication.
The vulnerability stems from insufficient authentication security in the communication protocol between BOSH Director and vCenter. While HTTPS may be used, the lack of proper certificate validation and pinning allows attackers to successfully impersonate vCenter endpoints. Because vCenter credentials typically grant full administrative control over the entire virtualization estate, successful credential capture yields complete takeover of every VM, datastore, and network the CPI manages.
This exposure exists on every CPI call (including routine deployment operations, not just when tags are configured) and cannot be mitigated by supplying a CA certificate alone. The attack impacts all infrastructure managed by the compromised vCenter instance, potentially affecting hundreds or thousands of VMs across multiple deployments and environments.
An attacker who can intercept traffic between the BOSH Director and vCenter can establish a malicious server impersonating the vCenter REST API. When the BOSH Director makes CPI calls to perform routine cloud infrastructure operations, the attacker captures the vCenter administrator username and password transmitted via HTTP Basic authentication.
The vulnerability stems from insufficient authentication security in the communication protocol between BOSH Director and vCenter. While HTTPS may be used, the lack of proper certificate validation and pinning allows attackers to successfully impersonate vCenter endpoints. Because vCenter credentials typically grant full administrative control over the entire virtualization estate, successful credential capture yields complete takeover of every VM, datastore, and network the CPI manages.
This exposure exists on every CPI call (including routine deployment operations, not just when tags are configured) and cannot be mitigated by supplying a CA certificate alone. The attack impacts all infrastructure managed by the compromised vCenter instance, potentially affecting hundreds or thousands of VMs across multiple deployments and environments.
Severity
7.7
High
CVSS 3.1: 7.7 (MITRE)
Exploitation
EPSS <1%
Type
CWE-295Improper Certificate Validation
Timeline
Published29 Aug 2026
Updated2 Sep 2026
First seen29 Aug 2026
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