CVE-2026-9130: Langflow OSS is affected by arbitrary code execution in custom component validation and trusted code enforcement

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-05 · updated 2026-10-24
Weakness: CWE-639

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.

Affected products

IBM Langflow OSS: from 1.0.0 before 1.11.0 — fixed in 1.11.0

How to fix

Upgrade to a fixed version: IBM Langflow OSS 1.11.0. Check the vendor advisory for mitigations.

References

https://www.ibm.com/support/pages/node/7282647

Get alerted when CVE-2026-9130 or the next vulnerability affects your stack