CVE-2025-66404

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 1.5%, top 28% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: Elevated riskExposed: 0

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

MCP Server Kubernetes is an MCP Server that can connect to a Kubernetes cluster and manage it. Prior to 2.9.8, there is a security issue exists in the exec_in_pod tool of the mcp-server-kubernetes MCP Server. The tool accepts user-provided commands in both array and string formats. When a string format is provided, it is passed directly to shell interpretation (sh -c) without input validation, allowing shell metacharacters to be interpreted. This vulnerability can be exploited through direct command injection or indirect prompt injection attacks, where AI agents may execute commands without explicit user intent. This vulnerability is fixed in 2.9.8.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
56(Track*)
EG Risk 56/100SSVC: Track*

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
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
73%
KEV
Not listed

Published

December 3, 2025

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Aug 8, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available

mcp-server-kubernetes potential security issue in exec_in_pod tool · Advisory · Flux159/mcp-server-kubernetes · GitHub

https://github.com/Flux159/mcp-server-kubernetes/security/advisories/GHSA-wvxp-jp4w-w8wg
github_commit Patch Available

commit d091107ff92d (Flux159/mcp-server-kubernetes)

Patch available: Flux159/mcp-server-kubernetes v3.2.0 (contains commit d091107ff92d)

https://github.com/Flux159/mcp-server-kubernetes/commit/d091107ff92d9ffad1b3c295092f142d6578c48b

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
mcp-server-kubernetes—2.9.8—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 28× 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 152 total refreshes for this CVE.

  1. 2026-09-19 15:42 UTCEPSS rescore
  2. 2026-09-18 19:27 UTCEPSS rescore
  3. 2026-09-17 19:30 UTCEPSS rescore
  4. 2026-09-16 14:07 UTCEPSS rescore
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  8. 2026-09-12 07:53 UTCOSV refresh
  9. 2026-09-11 14:52 UTCEPSS rescore
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  24. 2026-08-24 14:16 UTCEPSS rescore
  25. 2026-08-24 13:02 UTCOSV refresh
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  1. 2026-08-23 00:18 UTCEPSS rescore
  2. 2026-08-21 23:48 UTCEPSS rescore
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-19 17:03 UTCEPSS rescore
  5. 2026-08-18 13:47 UTCEPSS rescore
  6. 2026-08-17 13:46 UTCEPSS rescore
  7. 2026-08-16 14:55 UTCEPSS rescore
  8. 2026-08-16 02:13 UTCEPSS rescore
  9. 2026-08-15 01:30 UTCEPSS rescore
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  11. 2026-08-13 21:59 UTCEPSS rescore
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  13. 2026-08-11 13:42 UTCEPSS rescore
  14. 2026-08-10 23:59 UTCEPSS rescore
  15. 2026-08-09 13:46 UTCEPSS rescore
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  17. 2026-08-08 16:36 UTCEPSS rescore
  18. 2026-08-08 08:42 UTCEG score recompute
  19. 2026-08-07 16:26 UTCEPSS rescore
  20. 2026-08-06 13:46 UTCEPSS rescore
  21. 2026-08-05 19:17 UTCEPSS rescore
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  23. 2026-08-04 15:09 UTCEPSS rescore
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  26. 2026-08-02 02:26 UTCEPSS rescore
  27. 2026-08-01 04:15 UTCEPSS rescore
  28. 2026-07-30 16:27 UTCEPSS rescore
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  30. 2026-07-28 15:35 UTCEPSS rescore
  31. 2026-07-27 14:12 UTCEPSS rescore
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  37. 2026-07-23 14:18 UTCEPSS rescore
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  39. 2026-07-23 13:49 UTCOSV refresh
  40. 2026-07-23 03:01 UTCEG score recompute▲ 2.40
  41. 2026-07-22 14:08 UTCEPSS rescore
  42. 2026-07-21 15:24 UTCEPSS rescore
  43. 2026-07-20 17:08 UTCEPSS rescore
  44. 2026-07-19 02:28 UTCEPSS rescore
  45. 2026-07-18 10:04 UTCEPSS rescore
  46. 2026-07-18 10:04 UTCEPSS rescore
  47. 2026-07-16 17:02 UTCEPSS rescore
  48. 2026-07-15 16:57 UTCEPSS rescore
  49. 2026-07-15 16:57 UTCEPSS rescore
  50. 2026-07-15 01:59 UTCEPSS rescore
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  52. 2026-07-13 22:29 UTCEPSS rescore
  53. 2026-07-13 06:12 UTCEPSS rescore
  54. 2026-07-12 05:46 UTCEPSS rescore
  55. 2026-07-11 08:27 UTCEPSS rescore
  56. 2026-07-09 19:09 UTCEPSS rescore
  57. 2026-07-08 15:15 UTCEPSS rescore
  58. 2026-07-07 13:46 UTCEPSS rescore
  59. 2026-07-06 16:27 UTCEPSS rescore
  60. 2026-07-06 16:27 UTCEPSS rescore
  61. 2026-07-06 08:41 UTCOSV refresh
  62. 2026-07-06 02:23 UTCEPSS rescore
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  64. 2026-07-05 02:30 UTCEPSS rescore
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  66. 2026-07-04 06:31 UTCEPSS rescore
  67. 2026-07-04 06:30 UTCEPSS rescore
  68. 2026-07-01 15:06 UTCEPSS rescore
  69. 2026-07-01 15:06 UTCEPSS rescore
  70. 2026-06-30 23:22 UTCEPSS rescore
  71. 2026-06-29 14:06 UTCEPSS rescore
  72. 2026-06-29 14:06 UTCEPSS rescore
  73. 2026-06-28 14:07 UTCEPSS rescore
  74. 2026-06-28 14:07 UTCEPSS rescore
  75. 2026-06-28 04:56 UTCEPSS rescore

Frequently asked(5)

What is CVE-2025-66404?
CVE-2025-66404 is a high vulnerability published on December 3, 2025. MCP Server Kubernetes is an MCP Server that can connect to a Kubernetes cluster and manage it. Prior to 2.9.8, there is a security issue exists in the execinpod tool of the mcp-server-kubernetes MCP Server. The tool accepts user-provided commands in both array and string formats. When a string…
When was CVE-2025-66404 disclosed?
CVE-2025-66404 was first published in the National Vulnerability Database on December 3, 2025, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-66404 actively exploited?
CVE-2025-66404 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 27.2% of all scored CVEs.
What is the CVSS score of CVE-2025-66404?
CVE-2025-66404 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2025-66404?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-66404, 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.

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