CVE-2026-41859

Credential theft via disabled TLS verification

Published Jun 4, 2026 · Updated Jun 4, 2026

Improper certificate validation in BOSH before 282.1.9 allows man-in-the-middle attackers to steal Director credentials over HTTPS. UsersSync#bosh_api_response_body creates each Net::HTTP client with certificate verification disabled for Director information, deployment, and VM requests. A network position between nats-sync and the Director exposes Basic or UAA secrets and permits tampering with the VM list written to NATS authorization data.

CVSS severity7.1
High
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in BOSH before 282.1.9 allows man-in-the-middle attackers to steal Director credentials over HTTPS. UsersSync#bosh_api_response_body creates each Net::HTTP client with certificate verification disabled for Director information, deployment, and VM requests. A network position between nats-sync and the Director exposes Basic or UAA secrets and permits tampering with the VM list written to NATS authorization data.

The record

CVE
CVE-2026-41859
Published
Jun 4, 2026
Updated
Jun 4, 2026
Vendor
Cloud Foundry Foundation
Product
BOSH
Classifications
CWE-295, T1557
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Jun 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=0 <282.1.9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Cloud Foundry Foundation · BOSHversion=0 <282.1.9

Published CVSS scores

7.8VMware CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.1VMware CNACVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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