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
Trending — 3 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: 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)
EPSS
50.7%
KEV
Not listed

Published

June 25, 2026

Last Modified

July 1, 2026

Advisory Details (2)

Auto-updated Jul 3, 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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 87× in last 7d / 140× 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 140 total refreshes for this CVE.

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

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 50.7% 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.

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