gcdRadar
archive/Patch now/AIR-2026-1143
closedclosed 30 Jun 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-7663: IBM Langflow OSS MCP Resource Access Vulnerability

Langflow

IBM Langflow OSS contains an improper authorization enforcement flaw in the Streamable MCP transport endpoint. Unauthenticated attackers can access protected MCP project resources and execute operations.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
9.1
EPSS
0.01 · top 56% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
30 Jun 2026
last update
30 Jun 2026
CVE ids
CVE-2026-7663other records

Timeline · 1

  1. 30 Jun 2026CVE-2026-7663: IBM Langflow OSS 1.0.0 through 1.9.6 could allow unauthenticated attackers to access protected MCP project resources and execute…

Sources · 1

Advisories and databases

  1. 2026-06-30
    CVE-2026-7663: IBM Langflow OSS 1.0.0 through 1.9.6 could allow unauthenticated attackers to access protected MCP project resources and execute…
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-7663

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerabilityAgent hijack
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM03:2025 Supply ChainLLM06:2025 Excessive Agency
mitre atlas
AML.T0053 AI Agent Tool Invocation
tags
langflowmcp
dates
happened 30 Jun 2026 · first reported 30 Jun 2026
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 10:04Z · updated 2026-10-18 10:04Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2026-7663: IBM Langflow OSS MCP Resource Access Vulnerability

https://gcdradar.vercel.app/incidents/cve-2026-7663-ibm-langflow-oss-mcp-resource-access-vulnerabi · AIR-2026-1143 · closed 2026-06-30

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-06-30
- AI role: Attack on AI
- Products: Langflow
- CVE ids: CVE-2026-7663
- CVSS: 9.1

## Summary

IBM Langflow OSS contains an improper authorization enforcement flaw in the Streamable MCP transport endpoint. Unauthenticated attackers can access protected MCP project resources and execute operations.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-06-30: CVE-2026-7663: IBM Langflow OSS 1.0.0 through 1.9.6 could allow unauthenticated attackers to access protected MCP project resources and execute… (https://nvd.nist.gov/vuln/detail/CVE-2026-7663)

## Sources

- 2026-06-30 NVD: CVE-2026-7663: IBM Langflow OSS 1.0.0 through 1.9.6 could allow unauthenticated attackers to access protected MCP project resources and execute… https://nvd.nist.gov/vuln/detail/CVE-2026-7663

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

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