CVE-2026-61459

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM 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: epss, ghsa, secondary
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 9.8Exploit: Elevated riskExposed: 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(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
2%
EPSS %ILE
80%
KEV
Not listed

Published

July 10, 2026

Last Modified

July 17, 2026

Advisory Details (4)

Auto-updated Aug 22, 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.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
mcp-server-kubernetes0.1.0, 0.1.1, 0.1.2, 0.1.3, 0.1.63.9.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 156× 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.

Showing the most recent 100 of 241 total refreshes for this CVE.

  1. 2026-08-27 14:25 UTCEPSS rescore
  2. 2026-08-27 00:47 UTCEG score recompute
  3. 2026-08-26 14:46 UTCEPSS rescore
  4. 2026-08-25 14:49 UTCEG score recompute
  5. 2026-08-25 13:49 UTCEPSS rescore
  6. 2026-08-24 20:14 UTCEG score recompute
  7. 2026-08-24 09:27 UTCEG score recompute
  8. 2026-08-23 01:52 UTCEG score recompute
  9. 2026-08-23 00:19 UTCEPSS rescore
  10. 2026-08-22 03:31 UTCEG score recompute
  11. 2026-08-21 23:49 UTCEPSS rescore
  12. 2026-08-20 23:42 UTCEG score recompute
  13. 2026-08-20 22:55 UTCEPSS rescore
  14. 2026-08-20 01:32 UTCEG score recompute
  15. 2026-08-19 17:04 UTCEPSS rescore
  16. 2026-08-18 20:33 UTCEG score recompute
  17. 2026-08-18 13:48 UTCEPSS rescore
  18. 2026-08-17 16:07 UTCEG score recompute
  19. 2026-08-17 13:47 UTCEPSS rescore
  20. 2026-08-16 17:57 UTCEG score recompute
  21. 2026-08-16 14:56 UTCEPSS rescore
  22. 2026-08-16 03:01 UTCEG score recompute
  23. 2026-08-15 04:53 UTCEG score recompute
  24. 2026-08-15 01:30 UTCEPSS rescore
  25. 2026-08-13 23:09 UTCEG score recompute
Show 75 more
  1. 2026-08-13 22:00 UTCEPSS rescore
  2. 2026-08-12 17:25 UTCEG score recompute
  3. 2026-08-12 17:25 UTCGHSA enrichment
  4. 2026-08-12 13:51 UTCEPSS rescore
  5. 2026-08-12 13:44 UTCGHSA enrichment
  6. 2026-08-12 10:02 UTCGHSA enrichment
  7. 2026-08-12 06:19 UTCGHSA enrichment
  8. 2026-08-12 02:37 UTCEG score recompute
  9. 2026-08-12 02:37 UTCGHSA enrichment
  10. 2026-08-11 22:56 UTCGHSA enrichment
  11. 2026-08-11 19:15 UTCGHSA enrichment
  12. 2026-08-11 15:34 UTCEG score recompute
  13. 2026-08-11 15:34 UTCGHSA enrichment
  14. 2026-08-11 11:52 UTCGHSA enrichment
  15. 2026-08-11 08:11 UTCGHSA enrichment
  16. 2026-08-11 04:29 UTCGHSA enrichment
  17. 2026-08-11 00:48 UTCEG score recompute
  18. 2026-08-11 00:48 UTCGHSA enrichment
  19. 2026-08-11 00:00 UTCEPSS rescore
  20. 2026-08-10 21:07 UTCGHSA enrichment
  21. 2026-08-10 17:26 UTCGHSA enrichment
  22. 2026-08-10 13:45 UTCGHSA enrichment
  23. 2026-08-10 10:04 UTCGHSA enrichment
  24. 2026-08-10 06:22 UTCGHSA enrichment
  25. 2026-08-10 02:41 UTCGHSA enrichment
  26. 2026-08-09 22:59 UTCEG score recompute
  27. 2026-08-09 22:59 UTCGHSA enrichment
  28. 2026-08-09 19:18 UTCGHSA enrichment
  29. 2026-08-09 15:37 UTCEG score recompute
  30. 2026-08-09 15:37 UTCGHSA enrichment
  31. 2026-08-09 13:47 UTCEPSS rescore
  32. 2026-08-09 11:56 UTCGHSA enrichment
  33. 2026-08-09 08:14 UTCGHSA enrichment
  34. 2026-08-09 04:33 UTCGHSA enrichment
  35. 2026-08-09 00:52 UTCGHSA enrichment
  36. 2026-08-08 21:11 UTCGHSA enrichment
  37. 2026-08-08 17:29 UTCEG score recompute
  38. 2026-08-08 17:29 UTCGHSA enrichment
  39. 2026-08-08 16:37 UTCEPSS rescore
  40. 2026-08-08 13:48 UTCGHSA enrichment
  41. 2026-08-08 10:07 UTCGHSA enrichment
  42. 2026-08-08 06:26 UTCGHSA enrichment
  43. 2026-08-08 02:45 UTCGHSA enrichment
  44. 2026-08-07 23:04 UTCGHSA enrichment
  45. 2026-08-07 19:23 UTCEG score recompute
  46. 2026-08-07 19:23 UTCGHSA enrichment
  47. 2026-08-07 15:41 UTCGHSA enrichment
  48. 2026-08-07 12:00 UTCGHSA enrichment
  49. 2026-08-07 08:18 UTCGHSA enrichment
  50. 2026-08-07 04:37 UTCGHSA enrichment
  51. 2026-08-07 00:56 UTCGHSA enrichment
  52. 2026-08-06 21:14 UTCGHSA enrichment
  53. 2026-08-06 17:33 UTCGHSA enrichment
  54. 2026-08-06 13:52 UTCEG score recompute
  55. 2026-08-06 13:52 UTCGHSA enrichment
  56. 2026-08-06 13:47 UTCEPSS rescore
  57. 2026-08-06 10:10 UTCGHSA enrichment
  58. 2026-08-06 06:29 UTCGHSA enrichment
  59. 2026-08-06 02:48 UTCGHSA enrichment
  60. 2026-08-05 23:06 UTCGHSA enrichment
  61. 2026-08-05 19:25 UTCEG score recompute
  62. 2026-08-05 19:25 UTCGHSA enrichment
  63. 2026-08-05 19:17 UTCEPSS rescore
  64. 2026-08-05 19:17 UTCEPSS rescore
  65. 2026-08-05 15:43 UTCGHSA enrichment
  66. 2026-08-05 10:46 UTCGHSA enrichment
  67. 2026-08-05 06:32 UTCGHSA enrichment
  68. 2026-08-05 01:25 UTCGHSA enrichment
  69. 2026-08-04 21:25 UTCGHSA enrichment
  70. 2026-08-04 17:13 UTCEG score recompute
  71. 2026-08-04 17:13 UTCGHSA enrichment
  72. 2026-08-04 15:10 UTCEPSS rescore
  73. 2026-08-04 13:32 UTCEG score recompute
  74. 2026-08-04 13:32 UTCGHSA enrichment
  75. 2026-08-04 10:39 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-52638
    First seen Aug 11, 2026

    mcp-server-kubernetes 3.8.x - Argument Injection

    Open source ↗

Related CVEs(same CWE)

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, with the most recent update on July 17, 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 2% probability of exploitation in the next 30 days, which ranks it in the top 19.6% of all scored CVEs.
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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