CVE-2026-7664: CWE-287 Improper Authentication in IBM Langflow OSS
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.
AI Analysis
Technical Summary
CVE-2026-7664 is an improper authentication vulnerability in IBM Langflow OSS affecting versions 1.0.0 through 1.8.4. Due to insufficient authorization enforcement in the Streamable MCP transport endpoint, unauthenticated attackers can gain unauthorized access to protected MCP project resources and perform MCP operations. This vulnerability poses a critical risk as it allows full confidentiality, integrity, and availability impact on the affected system.
Potential Impact
Successful exploitation of this vulnerability allows unauthenticated attackers to fully compromise MCP project resources within IBM Langflow OSS, resulting in complete loss of confidentiality, integrity, and availability of those resources. This could lead to unauthorized data access, modification, or disruption of MCP operations.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented at this time. Users should monitor IBM's advisories for updates and apply patches once available.
CVE-2026-7664: CWE-287 Improper Authentication in IBM Langflow OSS
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.
CVSS v3.1
Score 9.8critical
Affected software
cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:langflow_oss:1.8.4:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-7664 is an improper authentication vulnerability in IBM Langflow OSS affecting versions 1.0.0 through 1.8.4. Due to insufficient authorization enforcement in the Streamable MCP transport endpoint, unauthenticated attackers can gain unauthorized access to protected MCP project resources and perform MCP operations. This vulnerability poses a critical risk as it allows full confidentiality, integrity, and availability impact on the affected system.
Potential Impact
Successful exploitation of this vulnerability allows unauthenticated attackers to fully compromise MCP project resources within IBM Langflow OSS, resulting in complete loss of confidentiality, integrity, and availability of those resources. This could lead to unauthorized data access, modification, or disruption of MCP operations.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented at this time. Users should monitor IBM's advisories for updates and apply patches once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-05-01T19:46:59.287Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a39572aeed863c81e053837
Added to database: 06/22/2026, 15:39:22 UTC
Last enriched: 06/29/2026, 21:45:58 UTC
Last updated: 08/05/2026, 12:41:17 UTC
Views: 98
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