CVE-2026-61459criticalCWE-88

CVE-2026-61459: critical vulnerability in Flux159 mcp-server-kubernetes

MCP Server Kubernetes < 3.9.0 Argument Injection via kubectl Structured Tools

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48Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 9.3epss 2.4%
from disclosure to weapon32 days
Published on NVDJul 10
1st PoC+32d
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
Flux159 · mcp-server-kubernetes
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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