CVE-2026-39884: Argument Injection in Kubernetes MCP Server Port Forward Tool
mcp-server-kubernetes
The mcp-server-kubernetes tool contains an argument injection vulnerability due to string concatenation in the port forwarding tool. Versions 3.4.0 and prior are impacted, allowing unexpected command parameter manipulation.
disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why
- CVSS
- 8.3
- EPSS
- <0.01 · top 82% · 2026-11-13
- fix status
- Fix status unknown
- first report
- 15 Apr 2026
- last update
- 15 Apr 2026
- CVE ids
Timeline · 1
Sources · 1
Advisories and databases
- 2026-04-15CVE-2026-39884: mcp-server-kubernetes is a Model Context Protocol server for Kubernetes cluster management.NVD · nvd.nist.gov/vuln/detail/CVE-2026-39884
Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.
Classification
- lane
- Patch now
- AI role
- Attack on AI
- categories
- Infrastructure vulnerability
- severity
- 2 · Disclosed vulnerability
- fix status
- Fix status unknown
- targets
- Framework / tooling
- owasp llm top 10
- LLM03:2025 Supply Chain
- mitre atlas
- no technique for these categories
- dates
- happened 15 Apr 2026 · first reported 15 Apr 2026
- origin
- NVDVulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
- record
- confidence 0.95 · created 2026-10-18 10:04Z · updated 2026-10-18 10:04Z
Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned
Copy a brief
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the brief as text
# CVE-2026-39884: Argument Injection in Kubernetes MCP Server Port Forward Tool https://gcdradar.vercel.app/incidents/cve-2026-39884-argument-injection-in-kubernetes-mcp-server-p · AIR-2026-1030 · closed 2026-04-15 - Lane: Patch now - Severity: 2 (Disclosed vulnerability) - Fix status: Fix status unknown - First reported: 2026-04-15 - AI role: Attack on AI - Products: mcp-server-kubernetes - CVE ids: CVE-2026-39884 - CVSS: 8.3 ## Summary The mcp-server-kubernetes tool contains an argument injection vulnerability due to string concatenation in the port forwarding tool. Versions 3.4.0 and prior are impacted, allowing unexpected command parameter manipulation. ## What to do No action recorded; read the sources below and the vendor's advisory. ## Latest updates - 2026-04-15: CVE-2026-39884: mcp-server-kubernetes is a Model Context Protocol server for Kubernetes cluster management. (https://nvd.nist.gov/vuln/detail/CVE-2026-39884) ## Sources - 2026-04-15 NVD: CVE-2026-39884: mcp-server-kubernetes is a Model Context Protocol server for Kubernetes cluster management. https://nvd.nist.gov/vuln/detail/CVE-2026-39884 Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.
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