CVE-2026-61459
CRITICALMCP Server Kubernetes < 3.9.0 Argument Injection via kubectl Structured Tools
Title source: cnaDescription
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.
References (5)
Core 5
Core References
Release Notes release-notes
Release Notes
https://github.com/Flux159/mcp-server-kubernetes/releases/tag/3.9.0
Exploit exploit
technical-description
Researcher Disclosure
https://github.com/Flux159/mcp-server-kubernetes/issues/328
Issue Tracking issue-tracking
Pull Request
https://github.com/Flux159/mcp-server-kubernetes/pull/329
Patch patch
Patch Commit
https://github.com/Flux159/mcp-server-kubernetes/commit/d7890f50a4567bf5d9842541ba6f41e180227f9a
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/mcp-server-kubernetes-argument-injection-via-kubectl-structured-tools
Scores
CVSS v3
9.8
EPSS
0.0046
EPSS Percentile
37.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
total
Details
CWE
CWE-88
Status
published
Products (2)
Flux159/mcp-server-kubernetes
< 3.9.0
suyogs/mcp-server-kubernetes
< 3.9.0
Published
Jul 10, 2026
Tracked Since
Jul 11, 2026