Langflow: IBM Langflow OSS 1.0.0 through 1.10.3 contain an authorization bypass vulnerability in the…
Langflow
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- Severity
- High, CVSS 7.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
- Record
- CVE-2026-9130
- Affects
- Langflow
- Known exploited
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Published
- Record first published by the source
- August 5, 2026
- Source last modified
- October 24, 2026
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.
Description quoted from the NVD record.
Who is affected
Langflow (also called IBM Langflow OSS) is a tool for building apps that use AI language models. This flaw affects versions 1.0.0 through 1.10.3, and only setups where several people each sign in with their own account (automatic login turned off). The problem is in the building block that saves and recalls chat conversations. Someone who already has an account could read the chat history of other users, because the product does not check who a conversation belongs to. This flaw is rated High.
What to do
- Find out who installed or runs Langflow for your organization: a staff member, a volunteer, or an IT provider or vendor. That person or company should handle the steps below.
- Have them check whether your setup uses a version from 1.0.0 through 1.10.3 and whether several people sign in with their own accounts.
- No fixed version is named for this flaw yet, so check the vendor advisory linked on this page for a fixed release and install it once it is available.
- If an IT provider or vendor runs Langflow for you, send them this advisory and ask when the update will be done.
Analysis written from the source record as of October 24, 2026 and reviewed before publishing.