CVE-2026-9130

HIGH 7.1

Langflow OSS is affected by arbitrary code execution in custom component validation and trusted code enforcement

CVSS Score

7.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	ibm
Product	langflow oss
Published	Aug 5, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

None

Affected Versions

IBM / Langflow OSS

1.0.0 ≤ 1.10.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Sergio Cabrera (ddlxstudio) https://github.com/nekros1xx