CVE-2026-39884: mcp-server-kubernetes is a Model Context Protocol server for Kubernetes cluster management

Routine

HIGH 8.3WATCHLISTUPGRADE

CVE-2026-39884 is a high-severity flaw (CVSS 8.3) affecting mcp-server-kubernetes. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 argumen

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 83%)
CISA exploited list	No
Weakness	CWE-88
Published	2026-04-15
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: suyogs

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-15 04:17 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

suyogs mcp-server-kubernetes UPGRADE

Affected: < 3.5.0

Fixed in: 3.5.0

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls mcp-server-kubernetes

2. UPGRADE to 3.5.0

npm install mcp-server-kubernetes@">=3.5.0"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-39884?

mcp-server-kubernetes: upgrade to 3.5.0. Exact commands for each OS are on this page.

Is CVE-2026-39884 being exploited?

CVE-2026-39884 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-39884 affect?

CVE-2026-39884 affects mcp-server-kubernetes. Severity is high (CVSS 8.3). 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

How urgent is CVE-2026-39884?

Priority 38/100. High severity; On your watchlist

Software pages

Kubernetes vulnerabilities

Related CVEs

CVE-2026-61459 CRITICAL 9.8 UPGRADE MCP Server Kubernetes before 3.9.0 contains an argument injection vulnerability in structured tools (kubectl_g

References

← Back to latest CVEs