CVE-2026-9130: Vulnerability in IBM Langflow OSS
IBM Langflow OSS 1.0.0 through 1.10.3 contain an authorization bypass vulnerability in the MemoryComponent that allows authenticated users to access chat history of other users via session_id collision. The MemoryComponent.retrieve_messages and store_message methods filter on session_id without validating flow_id or user_id ownership, enabling cross-user information disclosure through multiple authenticated API endpoints including /api/v1/run/*, /api/v1/responses, and /api/v2/workflow/*. This vulnerability only affects multi-user deployments with LANGFLOW_AUTO_LOGIN=False.
AI Analysis
Technical Summary
CVE-2026-9130 is an authorization bypass vulnerability in IBM Langflow OSS versions 1.0.0 through 1.10.3. The MemoryComponent's retrieve_messages and store_message methods filter on session_id but do not validate ownership of flow_id or user_id, enabling authenticated users to access chat histories of other users via session_id collisions. This affects multiple authenticated API endpoints including /api/v1/run/*, /api/v1/responses, and /api/v2/workflow/*. The vulnerability only impacts multi-user deployments with LANGFLOW_AUTO_LOGIN set to False.
Potential Impact
An authenticated user can access chat history data belonging to other users, resulting in cross-user information disclosure. The confidentiality of user chat data is compromised. There is no indication of integrity or availability impact. The vulnerability requires authentication and affects multi-user deployments with a specific configuration.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider reviewing deployment configurations, especially the LANGFLOW_AUTO_LOGIN setting, and restrict access to trusted users. Monitor vendor communications for official patches or updates.
CVE-2026-9130: Vulnerability in IBM Langflow OSS
Description
IBM Langflow OSS 1.0.0 through 1.10.3 contain an authorization bypass vulnerability in the MemoryComponent that allows authenticated users to access chat history of other users via session_id collision. The MemoryComponent.retrieve_messages and store_message methods filter on session_id without validating flow_id or user_id ownership, enabling cross-user information disclosure through multiple authenticated API endpoints including /api/v1/run/*, /api/v1/responses, and /api/v2/workflow/*. This vulnerability only affects multi-user deployments with LANGFLOW_AUTO_LOGIN=False.
CVSS v3.1
Score 7.1high
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:1.10.3:*:*:*:*:*:*:*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-2026-9130 is an authorization bypass vulnerability in IBM Langflow OSS versions 1.0.0 through 1.10.3. The MemoryComponent's retrieve_messages and store_message methods filter on session_id but do not validate ownership of flow_id or user_id, enabling authenticated users to access chat histories of other users via session_id collisions. This affects multiple authenticated API endpoints including /api/v1/run/*, /api/v1/responses, and /api/v2/workflow/*. The vulnerability only impacts multi-user deployments with LANGFLOW_AUTO_LOGIN set to False.
Potential Impact
An authenticated user can access chat history data belonging to other users, resulting in cross-user information disclosure. The confidentiality of user chat data is compromised. There is no indication of integrity or availability impact. The vulnerability requires authentication and affects multi-user deployments with a specific configuration.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider reviewing deployment configurations, especially the LANGFLOW_AUTO_LOGIN setting, and restrict access to trusted users. Monitor vendor communications for official patches or updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-05-20T18:05:00.910Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a738076bf8831d53945c686
Added to database: 08/05/2026, 18:27:02 UTC
Last enriched: 08/13/2026, 16:53:05 UTC
Last updated: 09/19/2026, 04:14:36 UTC
Views: 64
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