CVE-2026-9130

High

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.

SeverityHigh

CVSS7.1

Exploit probability—

Product

Langflow

PublishedAug 5, 2026

First seenAug 5, 2026

Weakness typeCWE-639Authorization bypass through user-controlled key

How to fix

Update

langflow langflow1.11.0 or later

Patches

ibm.com/support/pages/node/7282647

Affected products

Product	Affected versions	Fixed in
langflow langflow	1.0.0 ≤ v < 1.11.0	1.11.0

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