PYSEC-2026-3685
See a problem?- Import Source
- https://github.com/pypa/advisory-database/blob/main/vulns/mcp-server-kubernetes/PYSEC-2026-3685.yaml
- JSON Data
- https://api.osv.dev/v1/vulns/PYSEC-2026-3685
- Aliases
- Published
- 2026-08-19T11:56:25Z
- Modified
- 2026-08-19T12:45:06Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- 9.3 (Critical) CVSS_V4 - 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 CVSS Calculator
- Summary
- mcp-server-kubernetes argument injection can expose Kubernetes cluster credentials
- Details
-
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
-
- https://nvd.nist.gov/vuln/detail/CVE-2026-61459
- https://github.com/Flux159/mcp-server-kubernetes/issues/328
- https://github.com/Flux159/mcp-server-kubernetes/pull/329
- https://github.com/Flux159/mcp-server-kubernetes/commit/d7890f50a4567bf5d9842541ba6f41e180227f9a
- https://github.com/Flux159/mcp-server-kubernetes
- https://github.com/Flux159/mcp-server-kubernetes/releases/tag/3.9.0
- https://www.vulncheck.com/advisories/mcp-server-kubernetes-argument-injection-via-kubectl-structured-tools
- https://pypi.org/project/mcp-server-kubernetes
- https://github.com/advisories/GHSA-wmg3-h8mf-wgvr
Affected packages
PyPI / mcp-server-kubernetes
Package
- Name
- mcp-server-kubernetes
- View open source insights on deps.dev
- Purl
- pkg:pypi/mcp-server-kubernetes