CVE-2026-19303
Received Received - Intake

IBM Langflow OSS Path Traversal Vulnerability

Publication date: 2026-09-04

Last updated on: 2026-09-04

Assigner: IBM Corporation

Description
IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote authenticated attacker to delete arbitrary local files or directories due to improper limitation of a pathname to a restricted directory.

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Meta Information

Published
2026-09-04
Last Modified
2026-09-04
Generated
2026-09-04
AI Q&A
2026-09-04
EPSS Evaluated
N/A
NVD
CVE-2026-19303

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
ibm langflow From 1.0.0 (inc) to 1.11.2 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

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Executive Summary

IBM Langflow OSS 1.0.0 through 1.11.2 has a vulnerability where a remote authenticated attacker can delete arbitrary local files or directories. This occurs due to improper limitation of a pathname to a restricted directory, allowing path traversal attacks.

Detection Guidance

To detect this vulnerability, monitor for unauthorized file deletions or suspicious API requests to /api/v1/run/{flow_id} with path traversal sequences like ../. Check logs for unusual activity in Langflow deployments, especially those using S3 storage mode. Review file system integrity and look for missing or altered critical files.

Impact Analysis

This vulnerability can lead to loss of file integrity, deletion of critical files like cryptographic keys, or further system compromise. Attackers need low-privileged authenticated access, such as an API key or user session, to exploit it.

Mitigation Strategies

Immediately upgrade Langflow OSS to version 1.11.3 or later to address the vulnerability. Ensure all authenticated users have minimal privileges and review API keys for potential misuse. Monitor systems for signs of exploitation and restrict access to sensitive directories.

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