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CVE-2026-41859: CWE-295: Improper Certificate Validation in Cloud Foundry Foundation BOSH

0
High
VulnerabilityCVE-2026-41859cvecve-2026-41859cwe-295
Published: Thu Jun 04 2026 (06/04/2026, 01:51:45 UTC)
Source: CVE Database V5
Vendor/Project: Cloud Foundry Foundation
Product: BOSH

Description

CVE-2026-41859 is a high-severity vulnerability in Cloud Foundry Foundation's BOSH prior to version v282. 1. 9. It involves improper certificate validation (CWE-295) in the communication between nats-sync and the BOSH director, where the Net::HTTP client disables SSL verification. This allows a network man-in-the-middle attacker to steal director credentials (Basic auth header or UAA client secret) and tamper with the VM list in the NATS authorization file. Stolen credentials provide administrative access to the BOSH director. The vulnerability is fixed in BOSH version v282. 1. 9 or later. No official patch link or vendor advisory was provided in the data.

CVSS v4.0

Score 7.1high

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
Low
User Interaction
None
Vuln. Confidentiality
High
Vuln. Integrity
Low
Vuln. Availability
None
Subsq. Confidentiality
High
Subsq. Integrity
High
Subsq. Availability
High
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:H/SA:H

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 06/04/2026, 02:48:31 UTC

Technical Analysis

This vulnerability arises from the BOSH component using a Net::HTTP client configured with OpenSSL::SSL::VERIFY_NONE for SSL verification when communicating with the BOSH director. This improper certificate validation enables a man-in-the-middle attacker on the network path between nats-sync and the director to intercept and steal sensitive credentials and modify VM authorization data. The affected versions include all BOSH releases prior to and including v282.1.9. The issue is addressed in BOSH v282.1.9 and later versions.

Potential Impact

An attacker capable of performing a man-in-the-middle attack between nats-sync and the BOSH director can obtain administrative credentials, including Basic auth headers or UAA client secrets. This grants the attacker administrative access to the BOSH director, potentially allowing unauthorized control over deployments and virtual machines. Additionally, the attacker can tamper with the VM list in the NATS authorization file, potentially disrupting or manipulating authorized communications.

Mitigation Recommendations

A fix is available in BOSH version v282.1.9 and later. Users should upgrade to at least this version to remediate the vulnerability. Since no vendor advisory or patch link is provided, verify the upgrade path and patch status with official Cloud Foundry Foundation resources before applying. Until upgraded, avoid network configurations that allow man-in-the-middle attacks between nats-sync and the BOSH director.

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Technical Details

Data Version
5.2
Assigner Short Name
vmware
Date Reserved
2026-04-22T06:22:10.082Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6a20e3ffe29bf47b504cab9d

Added to database: 6/4/2026, 2:33:35 AM

Last enriched: 6/4/2026, 2:48:31 AM

Last updated: 6/4/2026, 4:02:23 AM

Views: 5

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