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Vulnerabilities

Vulnerability · CVE-2026-61459

MCP Server Kubernetes < 3.9.0 Argument Injection via kubectl Structured Tools

Published Jul 10, 2026 · catalog updated Jul 14, 2026 · Flux159

Last checked Oct 29, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-61459. EPSS is 2.36%. Act only if a listed version of Flux159 is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Critical9.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
2.36%
Remediation
Version ranges on file
Affected products
stated mcp-server-kubernetes · vendor Flux159 mcp-server-kubernetes

MCP Server Kubernetes before 3.9.0 contains an argument injection vulnerability in structured tools (kubectl_get, kubectl_describe, kubectl_delete) that allows attackers to bypass the assertNoDangerousFlags security check by supplying resourceType and name parameters with leading dashes. Attackers can inject the --server flag to redirect kubectl commands to an attacker-controlled API server, causing the operator's bearer token to be transmitted externally and enabling full cluster compromise.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated mcp-server-kubernetes< 3.9.0
  • vendor Flux159 mcp-server-kubernetesversion unspecified

How to fix CVE-2026-61459

  • Upgrade

    CVE-2026-61459 lists a fix boundary at 3.9.0. Compare the installed build with that boundary before you change production.

  • Version check

    Affected < 3.9.0

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-61459. EPSS is 2.36%. Act only if a listed version of Flux159 is installed.

Which versions are affected?

Compare what you have installed with < 3.9.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-88. EPSS 2.36%. There is no CISA KEV listing. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Technology hubs

Kubernetes security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 14, 2026 · CVE.org

    Updated

    MCP Server Kubernetes before 3.9.0 contains an argument injection vulnerability in structured tools (kubectl_get, kubectl_describe, kubectl_delete) that allows attackers to bypass the assertNoDangerousFlags security check by supplying resourceType and name parameters with leading dashes. Attackers can inject the --server flag to redirect kubectl commands to an attacker-controlled API server, causi

  2. Oct 25, 2026 · Tenable CVE Database

    Detected

    MCP Server Kubernetes before 3.9.0 contains an argument injection vulnerability in structured tools (kubectl_get, kubectl_describe, kubectl_delete) that allows attackers to bypass the assertNoDangerousFlags security check by supplying resourceType and name parameters with leading dashes. Attackers can inject the --server flag to redirect kubectl commands to an attacker-controlled API server, causi

Sources

  • CVE.orgVulnerability recordCVE-2026-61459

    MCP Server Kubernetes before 3.9.0 contains an argument injection vulnerability in structured tools (kubectl_get, kubectl_describe, kubectl_delete) that allows attackers to bypass the assertNoDangerousFlags security check by supplying resourceType and name parameters with leading

    cve.org
  • Exploit DatabasePublic exploit reference52638

    Public exploit archive reference. This is not confirmation of exploitation. The exploit body is not stored here.

    exploit-db.com
  • Tenable CVE DatabaseVulnerability recordCVE-2026-61459

    MCP Server Kubernetes before 3.9.0 contains an argument injection vulnerability in structured tools (kubectl_get, kubectl_describe, kubectl_delete) that allows attackers to bypass the assertNoDangerousFlags security check by supplying resourceType and name parameters with leading dashes. Attackers can inject the --server flag to redirect kubectl commands to an attacker-controlled API server, causi

    tenable.com

References

Freshness

Last verified in this catalog Oct 29, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Exploit DatabaseOct 27, 2026
  • CVE.orgOct 26, 2026
  • Tenable CVE DatabaseOct 26, 2026