Reference page — cumulative record through Thursday, August 20, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2025-71336

CVE-2025-71336CRITICAL

Flowise - Unsandboxed Remote Code Execution via Custom MCP

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   N   H   H   H    9.3   .0156   73.3     —

AFFECTED
  Product  Versions     Fixed
  Flowise  unspecified  3.0.6

TIMELINE
  Jun 20  Reserved by VulnCheck
  Jun 25  EXPLOIT PUBLISHED — CVE-2025-71336 (Flowise). Public exploit reference added.
  Jun 25  Published (CNA: VulnCheck)

CWE-78 · CNA: VulnCheck · CVSS v4.0 · 2 references · NVD status: Analyzed

Description

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 20, 2026	Reserved	Reserved by VulnCheck
June 25, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2025-71336 (Flowise). Public exploit reference added.
June 25, 2026	Published	Published (CNA: VulnCheck)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Flowise	Flowise	—	—	3.0.6

Weaknesses

CWE-78

References (2)

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6933-jpx5-q87q [Exploit, Mitigation, Vendor Advisory]
https://www.vulncheck.com/advisories/flowise-unsandboxed-remote-code-execution-via-custom-mcp [Third Party Advisory]

Authoritative record: CVE-2025-71336 at cve.org

Vendors: flowise

Weaknesses: CWE-78

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2025-71336 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Thursday, August 20, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.