CVE-2026-30618

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-16. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

xszyou Fay 4.3.1 contains a remote code execution vulnerability in its MCP STDIO server management and command execution handling. A remote attacker can access the publicly exposed MCP management interface and configure an MCP STDIO server with attacker-controlled commands and parameters, resulting in execution of arbitrary commands on the server. Successful exploitation allows arbitrary command execution within the context of the Fay service.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
65%
KEV
Not listed

Published

July 15, 2026

Last Modified

July 16, 2026

Advisory Details (2)

Auto-updated Aug 29, 2026
No patch confirmed yet.
generic

MCP STDIO Command Injection: Full Vulnerability Advisory

https://www.ox.security/blog/mcp-supply-chain-advisory-rce-vulnerabilities-across-the-ai-ecosystem/
generic

GitHub - xszyou/Fay: fay是一个帮助数字人（2.5d、3d、移动、pc、网页）或大语言模型（openai兼容、deepseek）连通业务系统的agent框架。 · GitHub

https://github.com/xszyou/Fay

Vendor Advisories for CVE-2026-30618(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 36× in last 7d / 210× 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 275 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-30618?
CVE-2026-30618 is a critical vulnerability published on July 15, 2026. xszyou Fay 4.3.1 contains a remote code execution vulnerability in its MCP STDIO server management and command execution handling. A remote attacker can access the publicly exposed MCP management interface and configure an MCP STDIO server with attacker-controlled commands and parameters, resulting…
When was CVE-2026-30618 disclosed?
CVE-2026-30618 was first published in the National Vulnerability Database on July 15, 2026, with the most recent update on July 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-30618 actively exploited?
CVE-2026-30618 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 34.5% of all scored CVEs.
What is the CVSS score of CVE-2026-30618?
CVE-2026-30618 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-30618?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-30618, 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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