CVE-2025-71336

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-26. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

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

Flowise before 3.0.6 (affected versions 2.2.7-patch.1 and earlier) contains an unsandboxed remote code execution vulnerability in the Custom MCP feature, which is designed to execute OS commands such as launching local MCP servers. Because Flowise's authentication and authorization model is minimal and lacks role-based access control, and the default installation runs without authentication unless FLOWISE_USERNAME and FLOWISE_PASSWORD are set, an attacker can send a crafted JSON payload with the header 'x-request-from: internal' to the /api/v1/node-load-method/customMCP endpoint to execute arbitrary OS commands, resulting in complete compromise of the platform container or server.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
—
EPSS
51.3%
KEV
Not listed

Published

June 25, 2026

Last Modified

July 1, 2026

Advisory Details (2)

Auto-updated Jul 11, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Unsandboxed RCE via Custom MCP · Advisory · FlowiseAI/Flowise · GitHub

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6933-jpx5-q87q
generic

Flowise - Unsandboxed Remote Code Execution via Custom MCP | Advisories | VulnCheck

https://www.vulncheck.com/advisories/flowise-unsandboxed-remote-code-execution-via-custom-mcp

Vendor Advisories for CVE-2025-71336(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)
npm(1)
PackageVulnerable rangeFixed inDependents
flowise—3.0.6—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 17× 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 156 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-71336?
CVE-2025-71336 is a critical vulnerability published on June 25, 2026. Flowise before 3.0.6 (affected versions 2.2.7-patch.1 and earlier) contains an unsandboxed remote code execution vulnerability in the Custom MCP feature, which is designed to execute OS commands such as launching local MCP servers. Because Flowise's authentication and authorization model is minimal…
When was CVE-2025-71336 disclosed?
CVE-2025-71336 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on July 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-71336 actively exploited?
CVE-2025-71336 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 51.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-71336?
CVE-2025-71336 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2025-71336?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-71336, 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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