CVE-2025-71336

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM 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
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.1%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
9.8CRITICALmedium confidence
EG Risk
49
EG Risk 49/100CISA SSVC

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%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.1%
EPSS %ILE
65th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

June 25, 2026

Last Modified

September 30, 2026

Advisory Details (2)

Auto-updated Oct 8, 2026
🔬 Proof of concept available. Patch available. Sources: github.
githubMentions a patch (unverified)🟡 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 rangeFix by version rangeDependents
flowise—
  • 2.2.7-patch.1 up to 3.0.6: fixed in 3.0.6
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 39× 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 421 total refreshes for this CVE.

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

Related CVEs(same product + 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 on June 25, 2026, with the most recent update on September 30, 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 1.1% probability of exploitation in the next 30 days (65th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-71336?
CVE-2025-71336 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2025-71336?
A fix for CVE-2025-71336 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-71336 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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