CVE-2026-61459

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-10. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
Trending — 4 sources updated this week
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

MCP Server Kubernetes before 3.9.0 contains an argument injection vulnerability in structured tools (kubectl_get, kubectl_describe, kubectl_delete) that allows attackers to bypass the assertNoDangerousFlags security check by supplying resourceType and name parameters with leading dashes. Attackers can inject the --server flag to redirect kubectl commands to an attacker-controlled API server, causing the operator's bearer token to be transmitted externally and enabling full cluster compromise.

CVSS v3
9.8
EG Score
9.8(high)
EPSS
34.1%
KEV
Not listed

Published

July 10, 2026

Last Modified

July 10, 2026

Advisory Details (4)

Auto-updated Jul 10, 2026
Patch available. Sources: github_commit, github_pr.
generic

MCP Server Kubernetes < 3.9.0 Argument Injection via kubectl Structured Tools | Advisories | VulnCheck

https://www.vulncheck.com/advisories/mcp-server-kubernetes-argument-injection-via-kubectl-structured-tools
github_pr Patch Available

Guard port_forward argv against flag injection

Patch available: Flux159/mcp-server-kubernetes v4.0.0 (PR #329 merged 2026-07-08)

https://github.com/Flux159/mcp-server-kubernetes/pull/329
generic

kubectl argument injection in structured tools (--server/--token) leaks the operator's cluster bearer token · Issue #328 · Flux159/mcp-server-kubernetes · GitHub

https://github.com/Flux159/mcp-server-kubernetes/issues/328
github_commit Patch Available

commit d7890f50a456 (Flux159/mcp-server-kubernetes)

Patch available: Flux159/mcp-server-kubernetes v3.9.0 (contains commit d7890f50a456)

https://github.com/Flux159/mcp-server-kubernetes/commit/d7890f50a4567bf5d9842541ba6f41e180227f9a

Vendor Advisories for CVE-2026-61459(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 21× in last 7d / 21× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-12 05:46 UTCEPSS rescore
  2. 2026-07-12 04:15 UTCEG score recompute
  3. 2026-07-12 04:15 UTCGHSA enrichment
  4. 2026-07-12 00:33 UTCEG score recompute
  5. 2026-07-12 00:33 UTCGHSA enrichment
  6. 2026-07-11 20:52 UTCEG score recompute
  7. 2026-07-11 20:52 UTCGHSA enrichment
  8. 2026-07-11 17:10 UTCEG score recompute
  9. 2026-07-11 17:10 UTCGHSA enrichment
  10. 2026-07-11 13:29 UTCEG score recompute
  11. 2026-07-11 13:29 UTCGHSA enrichment
  12. 2026-07-11 09:48 UTCEG score recompute
  13. 2026-07-11 09:48 UTCGHSA enrichment
  14. 2026-07-11 06:06 UTCEG score recompute
  15. 2026-07-11 06:06 UTCGHSA enrichment
  16. 2026-07-11 02:22 UTCEG score recompute
  17. 2026-07-11 02:22 UTCGHSA enrichment
  18. 2026-07-10 22:40 UTCEG score recompute
  19. 2026-07-10 22:39 UTCGHSA enrichment
  20. 2026-07-10 18:58 UTCEG score recompute
  21. 2026-07-10 18:57 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-61459?
CVE-2026-61459 is a critical vulnerability published on July 10, 2026. MCP Server Kubernetes before 3.9.0 contains an argument injection vulnerability in structured tools (kubectlget, kubectldescribe, kubectl_delete) that allows attackers to bypass the assertNoDangerousFlags security check by supplying resourceType and name parameters with leading dashes. Attackers…
When was CVE-2026-61459 disclosed?
CVE-2026-61459 was first published in the National Vulnerability Database on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-61459 actively exploited?
CVE-2026-61459 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 34.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-61459?
CVE-2026-61459 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-61459?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-61459, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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