CVE-2026-39884

Katalog CVE

CVSS 8.1 · High EPSS 0,42%

Kerentanan Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') pada suyogs mcp-server-kubernetes. Skor CVSS 3.1 8.1 (High) menurut NVD.

Deskripsi (NVD)

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 is constructed via string concatenation with user-controlled input and then naively split on spaces before being passed to spawn(). Unlike all other tools in the codebase which correctly use array-based argument passing with execFileSync(), port_forward treats every space in user-controlled fields (namespace, resourceType, resourceName, localPort, targetPort) as an argument boundary, allowing an attacker to inject arbitrary kubectl flags. This enables exposure of internal Kubernetes services to the network by injecting --address=0.0.0.0, cross-namespace targeting by injecting additional -n flags, and indirect exploitation via prompt injection against AI agents connected to the MCP server. This issue has been fixed in version 3.5.0.

Rincian

Terbit di NVD

15 April 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

8.1 (High), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

EPSS (30 hari)

0,42% peluang dieksploitasi; lebih tinggi dari 34,1% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/Flux159/mcp-server-kubernetes/security/advisories/GHSA-4xqg-gf5c-ghwq mitigasi · advisory vendor
• https://github.com/Flux159/mcp-server-kubernetes/releases/tag/v3.5.0 product · release notes