Vulnerability Description
MKP is a Model Context Protocol server for Kubernetes. Prior to 0.4.1, cmd/server/main.go exposes the default HTTP endpoint and pkg/mcp/server.go registers the unauthenticated get_resource tool, which accepts attacker-controlled limitBytes and tailLines values for the pods logs subresource. buildPodLogOpts() in pkg/k8s/subresource.go parses those values as unbounded int64 parameters, and defaultGetPodLogs() copies the returned Kubernetes log stream through io.Copy into an in-memory bytes.Buffer without an application-side cap. A remote attacker who can reach the default port 8080 MCP endpoint and select a pod with sufficiently large accumulated logs can send one tools/call request that causes large allocations and additional response copies, while the request-frequency limiter does not constrain per-request volume. This can exhaust process memory, terminate the MKP server, and deny the MCP service; observed testing showed more than one GiB of RSS growth while handling a 128 MiB requested stream. This issue is fixed in version 0.4.1.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/StacklokLabs/mkp/commit/37bf6bac862aa3b1c71b8aa1b8364eae78189
- https://github.com/StacklokLabs/mkp/security/advisories/GHSA-qw5r-ppcg-f8rj
FAQ
What is CVE-2026-50125?
CVE-2026-50125 is a vulnerability with a CVSS score of 7.5 (HIGH). MKP is a Model Context Protocol server for Kubernetes. Prior to 0.4.1, cmd/server/main.go exposes the default HTTP endpoint and pkg/mcp/server.go registers the unauthenticated get_resource tool, which...
How severe is CVE-2026-50125?
CVE-2026-50125 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-50125?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.