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PatchSiren cyber security CVE debrief

CVE-2026-41857 CloudFoundry BOSH CVE debrief

A compromised or malicious BOSH Director can execute arbitrary shell commands on the operator's workstation when the operator runs bosh ssh (or bosh scp/bosh logs -f) with default flags. This issue affects BOSH CLI versions prior to 7.10.5. The vulnerability arises from the BOSH CLI's handling of ssh commands, allowing a malicious director to inject commands. Users of Cloudfoundry Bosh Cli should be aware of this vulnerability and take steps to mitigate it, especially if they are using versions prior to 7.10.5.

Vendor
CloudFoundry BOSH
Product
BOSH CLI
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-09
Original CVE updated
2026-07-13
Advisory published
2026-07-09
Advisory updated
2026-07-13

Who should care

Users of Cloudfoundry Bosh Cli, especially those using versions prior to 7.10.5, should be aware of this vulnerability and take steps to mitigate it. Operators, platform administrators, and security teams should review the vulnerability details and plan for updates or mitigations as necessary.

Technical summary

The vulnerability arises from the BOSH CLI's handling of ssh commands. When an operator runs 'bosh ssh' (or 'bosh scp', 'bosh logs -f') with default flags, a compromised or malicious BOSH Director can inject arbitrary shell commands on the operator's workstation. This issue is rated as HIGH with a CVSS score of 7.1. Affected versions include all BOSH CLI versions before 7.10.5.

Defensive priority

High priority should be given to updating BOSH CLI to version 7.10.5 or later. Operators should exercise caution when using 'bosh ssh' or related commands with default flags, especially when interacting with untrusted BOSH Directors.

Recommended defensive actions

  • Update BOSH CLI to version 7.10.5 or later
  • Use secure flags when running 'bosh ssh' or related commands
  • Verify the integrity of BOSH Directors before using them
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record was published on 2026-07-09T06:16:20.287Z and was last modified on 2026-07-13T13:37:39.707Z. The NVD entry is currently Analyzed. This information is based on the provided source corpus and may not reflect the full scope of the vulnerability. Users should verify the details with the official CVE record and NVD entry for the most accurate and up-to-date information.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-41857 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-41857

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-41857 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-41857

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.