CVE-2026-18899

Analyzed Analyzed - Analysis Complete

Path Traversal Vulnerability in IBM Langflow OSS

Publication date: 2026-08-28

Last updated on: 2026-09-01

Assigner: IBM Corporation

Description

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to read arbitrary files due to path traversal.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-28

Last Modified

2026-09-01

Generated

2026-09-18

AI Q&A

2026-08-29

EPSS Evaluated

2026-09-15

NVD

CVE-2026-18899

EUVD

EUVD-2026-67954

Affected Vendors & Products

Vendor	Product	Version / Range
langflow	langflow	From 1.0.0 (inc) to 1.11.2 (exc)

Helpful Resources

Exploitability

CWE

KEV

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.

Attack-Flow Graph

Executive Summary

IBM Langflow OSS 1.0.0 through 1.11.1 has a path traversal vulnerability that allows a remote attacker to read arbitrary files on the system. This occurs due to improper handling of file paths, enabling unauthorized access to sensitive data.

Detection Guidance

To detect this vulnerability, check for IBM Langflow OSS versions 1.0.0 through 1.11.1. Test for path traversal by attempting to access files outside the intended directory using crafted requests. Monitor logs for unusual file access patterns or errors indicating path traversal attempts.

Impact Analysis

This vulnerability could allow attackers to access sensitive files, including configuration files, logs, or other confidential data stored on the affected system. It may lead to data breaches, unauthorized information disclosure, or further exploitation of the system.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR, HIPAA, or other regulations due to unauthorized access to personal or sensitive data. Organizations may face legal penalties, fines, or reputational damage if such breaches occur.

Mitigation Strategies

Update IBM Langflow OSS to a version beyond 1.11.1 to address the path traversal vulnerability. If immediate update is not possible, restrict network access to the application and monitor for suspicious file access attempts.

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