What is CVE-2026-39884?

CVE-2026-39884 is a high-severity vulnerability in Flux159 Mcp-server-kubernetes, classified under Argument Injection. CVSS score: 8.3/10. Published 2026-04-14.

How severe is CVE-2026-39884?

High severity. CVSS v3 base score is 8.3 out of 10.

Vulnerability in Flux159 Mcp-server-kubernetes

CVE-2026-39884

mcp-server-kubernetes is a Model Context Protocol server for Kubernetes cluster management. Versions 3.4.0 and prior contain an argument injection vulnerability in the port_forward tool in src/tools/port_forward.ts, where a kubectl command…

EPSS: 0.000 (14.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L.

Affected products

Flux159 Mcp-server-kubernetes — versions < 3.5.0

Weakness classification (CWE)

CWE-88 — Argument Injection

References

https://github.com/Flux159/mcp-server-kubernetes/security/advisories/GHSA-4xqg-gf5c-ghwq (x_refsource_CONFIRM)
https://github.com/Flux159/mcp-server-kubernetes/releases/tag/v3.5.0 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-39884?: CVE-2026-39884 is a high-severity vulnerability in Flux159 Mcp-server-kubernetes, classified under Argument Injection. CVSS score: 8.3/10. Published 2026-04-14.
How severe is CVE-2026-39884?: High severity. CVSS v3 base score is 8.3 out of 10.