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6.5

IBM Langflow OSS lets logged‑in users read others’ files

CVE-2026-9225 · published 1 month ago
Summary

Versions 1.0.0 through 1.11.5 of IBM Langflow OSS allow a user who is signed in to request a file path that belongs to a different user. The system does not check that the requester owns the file, so the attacker can see another user's uploaded data. Apply the vendor's update or restrict the API until the fix is installed.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
ibm langflow oss <= 1.11.5
Original advisory text
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 componen...
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.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
6.5 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-639Authorization Bypass Through User-Controlled Key
Timeline
Published10 Sep 2026
Updated4 Nov 2026
First seen10 Sep 2026
Sources
CVE-2026-9225 · NVD
CVE-2026-9225 · MITRE
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