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CVE-2026-7664— Unauthenticated Flow Execution via Webhook Endpoint in Langflow OSS

CVSS 9.8 · Critical EPSS 0.28% · P19
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I. Basic Information for CVE-2026-7664

Vulnerability Information
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Vulnerability Title
Unauthenticated Flow Execution via Webhook Endpoint in Langflow OSS
Source: NVD (National Vulnerability Database)
Vulnerability Description
IBM Langflow OSS 1.0.0 through 1.8.4 could allow unauthenticated attackers to access protected MCP project resources and execute MCP operations due to improper authorization enforcement in the Streamable MCP transport endpoint.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
认证机制不恰当
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
IBMLangflow OSS 1.0.0 ~ 1.8.4 cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-7664

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III. Intelligence Information for CVE-2026-7664

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Other References for CVE-2026-7664 (1)

Same Patch Batch · IBM · 2026-06-22 · 21 CVEs total

CVE-2026-1056110.0 CRITICALUnauthenticated Remote Code Execution in Langflow OSS PythonREPLComponent via Builtins Inj
CVE-2026-126289.1 CRITICALHardcoded credential in the IBM Storage Protect Snapshot For Windows leads to unauthorized
CVE-2026-90728.1 HIGHWebSphere Application Server is Affected By Denial of Service, HTTP Request Smuggling, and
CVE-2026-90717.5 HIGHIBM WebSphere Application Server and WebSphere Application Server Liberty are affected by
CVE-2026-88587.5 HIGHWebSphere Application Server is Affected By Denial of Service, HTTP Request Smuggling, and
CVE-2026-90067.4 HIGHIBM WebSphere Application Server is affected by server-side request forgery
CVE-2026-86467.4 HIGHIBM WebSphere Application Server and WebSphere Application Server Liberty are affected by
CVE-2024-541786.5 MEDIUMMultiple vulnerabilities affect IBM Db2® on Cloud Pak for Data, and Db2 Warehouse on Cloud
CVE-2024-514546.5 MEDIUMIBM Engineering Lifecycle Management - Engineering Workflow Management is impacted by vuln
CVE-2026-80596.1 MEDIUMMultiple Vulnerabilities in IBM Datacap
CVE-2025-26696.0 MEDIUMMultiple vulnerabilities affect IBM Db2® on Cloud Pak for Data, and Db2 Warehouse on Cloud
CVE-2026-93205.9 MEDIUMIBM WebSphere Application Server and WebSphere Application Server Liberty are affected by
CVE-2026-108525.9 MEDIUMWebsphere Application Server is Affected By a Denial of Service in IBM WebSphere Applicati
CVE-2026-86365.5 MEDIUMMultiple Vulnerabilities in IBM Datacap
CVE-2026-113725.4 MEDIUMIBM TRIRIGA Cross-Site Scripting Vulnerability
CVE-2025-331285.4 MEDIUMIBM Engineering Lifecycle Management - Engineering Workflow Management is impacted by vuln
CVE-2023-338545.3 MEDIUMMultiple vulnerabilities affect IBM Db2® on Cloud Pak for Data, and Db2 Warehouse on Cloud
CVE-2026-72535.3 MEDIUMIBM Watson Speech Services Cartridge is vulnerable to Server-Side Request Forgery (SSRF) i
CVE-2026-96102.3 LOWMultiple Vulnerabilities in IBM Datacap
CVE-2026-10845IBM WebSphere Application Server is affected by an authentication bypass vulnerability

IV. Related Vulnerabilities

Same product: Langflow OSS
Same vendor: IBM
Same weakness: CWE-287

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