What’s Vulnerable › Vulnerabilities
CVE-2026-9225: Langflow is vulnerable to unauthorized file system access due to path traversal and missing storage path validation
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-10 · updated 2026-09-15
- Weakness: CWE-639
Description
IBM Langflow OSS 1.0.0 through 1.11.5 Langflow could allow an authenticated attacker to access sensitive files belonging to other users due to improper access control in the File/Read File component. When executing flows through the /api/v1/run/advanced/{flow_id} endpoint, the application allows component inputs to reference storage paths using arbitrary user or flow identifiers without verifying ownership. An attacker with low‑privileged authenticated access can supply a crafted file path pointing to another user’s storage namespace, causing the backend to read and return the contents of files uploaded by other users. This vulnerability bypasses intended authorization checks enforced by the file management API and may result in unauthorized disclosure of sensitive user data.
Affected products
- IBM Langflow OSS: from 1.0.0 before 1.11.6 — fixed in 1.11.6
How to fix
Upgrade to a fixed version: IBM Langflow OSS 1.11.6. Check the vendor advisory for mitigations.
References
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