Vulnerability in Flux159 Mcp-Server-Kubernetes
CVE-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, causing the operator's bearer token to be transmitted externally and enabling full cluster compromise.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.024 (83.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.021 · newest: 0.024 · change: +0.003
Affected products
Weakness classification (CWE)
References
- github.com/Flux159/mcp-server-kubernetes/releases/tag/3.9.0 (release-notes, Release Notes)
- github.com/Flux159/mcp-server-kubernetes/issues/328 (Exploit, technical-description, exploit, Mitigation, Issue Tracking, Vendor Advisory)
- github.com/Flux159/mcp-server-kubernetes/pull/329 (issue-tracking, Patch, Issue Tracking)
- github.com/Flux159/mcp-server-kubernetes/commit/d7890f50a4567bf5d9842541ba6f41e… (Patch, patch)
- www.vulncheck.com/advisories/mcp-server-kubernetes-argument-injection-via-kubec… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-61459?
- CVE-2026-61459 is a critical-severity vulnerability in Flux159 Mcp-Server-Kubernetes, classified under Argument Injection. CVSS score: 9.8/10. Published 2026-07-10.
- How severe is CVE-2026-61459?
- Critical severity. CVSS v3 base score is 9.8 out of 10.