CVE-2026-41859: CWE-295: Improper Certificate Validation in Cloud Foundry Foundation BOSH
A network man-in-the-middle between nats-sync and the BOSH director can steal the director credentials (Basic auth header or UAA client secret) and can tamper with the VM list that is written into the NATS authorization file. Stolen credentials grant administrative director access. UsersSync#bosh_api_response_body builds a Net::HTTP client with verify_mode = OpenSSL::SSL::VERIFY_NONE for every director call (/info, /deployments, /deployments/<name>/vms). Affected versions: - BOSH: all versions prior to v282.1.9 (inclusive); fixed in v282.1.9 or later
AI Analysis
Technical Summary
This vulnerability (CWE-295) in BOSH occurs due to improper certificate validation in the communication between nats-sync and the BOSH director. Specifically, the Net::HTTP client disables SSL certificate verification for director API calls, enabling a man-in-the-middle attacker to intercept and steal sensitive credentials such as Basic auth headers or UAA client secrets. Additionally, the attacker can manipulate the VM list written into the NATS authorization file. The vulnerability affects all BOSH versions prior to 282.1.9, with a fix introduced in version 282.1.9.
Potential Impact
An attacker positioned as a man-in-the-middle can steal administrative credentials for the BOSH director, granting them full administrative access. This compromises the integrity and confidentiality of the director and potentially the entire deployment managed by BOSH. The attacker can also tamper with the VM list used for authorization, potentially disrupting or manipulating VM operations.
Mitigation Recommendations
A fix is available in BOSH version 282.1.9 and later. Users should upgrade to version 282.1.9 or newer to resolve this vulnerability. Since no official remediation level or temporary fix is stated, upgrading to the fixed version is the recommended action. Patch status is confirmed by the version information in the description.
CVE-2026-41859: CWE-295: Improper Certificate Validation in Cloud Foundry Foundation BOSH
Description
A network man-in-the-middle between nats-sync and the BOSH director can steal the director credentials (Basic auth header or UAA client secret) and can tamper with the VM list that is written into the NATS authorization file. Stolen credentials grant administrative director access. UsersSync#bosh_api_response_body builds a Net::HTTP client with verify_mode = OpenSSL::SSL::VERIFY_NONE for every director call (/info, /deployments, /deployments/<name>/vms). Affected versions: - BOSH: all versions prior to v282.1.9 (inclusive); fixed in v282.1.9 or later
CVSS v4.0
Score 7.1high
Affected software
pkg:github/cloudfoundry/boshRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-295) in BOSH occurs due to improper certificate validation in the communication between nats-sync and the BOSH director. Specifically, the Net::HTTP client disables SSL certificate verification for director API calls, enabling a man-in-the-middle attacker to intercept and steal sensitive credentials such as Basic auth headers or UAA client secrets. Additionally, the attacker can manipulate the VM list written into the NATS authorization file. The vulnerability affects all BOSH versions prior to 282.1.9, with a fix introduced in version 282.1.9.
Potential Impact
An attacker positioned as a man-in-the-middle can steal administrative credentials for the BOSH director, granting them full administrative access. This compromises the integrity and confidentiality of the director and potentially the entire deployment managed by BOSH. The attacker can also tamper with the VM list used for authorization, potentially disrupting or manipulating VM operations.
Mitigation Recommendations
A fix is available in BOSH version 282.1.9 and later. Users should upgrade to version 282.1.9 or newer to resolve this vulnerability. Since no official remediation level or temporary fix is stated, upgrading to the fixed version is the recommended action. Patch status is confirmed by the version information in the description.
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: 06/04/2026, 02:33:35 UTC
Last enriched: 06/11/2026, 08:46:27 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 98
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