CVE-2026-85025: CWE-863 Incorrect Authorization in IBM Langflow OSS
IBM Langflow OSS 1.0.0 through 1.11.5 Langflow could allow an unauthenticated attacker to execute arbitrary code and access or modify chat sessions through publicly shared MCP project endpoints due to improper enforcement of public-flow security restrictions and session isolation controls.
AI Analysis
Technical Summary
IBM Langflow OSS versions 1.0.0 through 1.11.5 contain an incorrect authorization vulnerability (CWE-863) that permits unauthenticated attackers to execute arbitrary code and access or modify chat sessions through publicly shared MCP project endpoints. The root cause is improper enforcement of public-flow security restrictions and session isolation controls, which fails to prevent unauthorized access to sensitive operations and data.
Potential Impact
An unauthenticated attacker can remotely execute arbitrary code and gain unauthorized access to or modify chat sessions. This compromises confidentiality, integrity, and availability of the affected system, potentially leading to full system compromise.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
CVE-2026-85025: CWE-863 Incorrect Authorization in IBM Langflow OSS
Description
IBM Langflow OSS 1.0.0 through 1.11.5 Langflow could allow an unauthenticated attacker to execute arbitrary code and access or modify chat sessions through publicly shared MCP project endpoints due to improper enforcement of public-flow security restrictions and session isolation controls.
CVSS v3.1
Score 9.8critical
Affected software
IBM
Langflow OSS
pkg:github/ibm/langflow_osscpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:langflow_oss:1.11.5:*:*:*:*:*:*:*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
IBM Langflow OSS versions 1.0.0 through 1.11.5 contain an incorrect authorization vulnerability (CWE-863) that permits unauthenticated attackers to execute arbitrary code and access or modify chat sessions through publicly shared MCP project endpoints. The root cause is improper enforcement of public-flow security restrictions and session isolation controls, which fails to prevent unauthorized access to sensitive operations and data.
Potential Impact
An unauthenticated attacker can remotely execute arbitrary code and gain unauthorized access to or modify chat sessions. This compromises confidentiality, integrity, and availability of the affected system, potentially leading to full system compromise.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-09-02T19:57:50.612Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa31e6991cc7f3848be4080
Added to database: 09/10/2026, 21:17:29 UTC
Last enriched: 09/10/2026, 21:31:48 UTC
Last updated: 09/10/2026, 22:12:31 UTC
Views: 7
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