CVE-2026-12942

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Path Traversal Vulnerability in IBM Langflow OSS

Publication date: 2026-07-30

Last updated on: 2026-07-30

Assigner: IBM Corporation

Description

IBM Langflow OSS 1.0.0 through 1.10.1 could allow a remote attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing "dot dot " sequences ( /.. /) to view arbitrary files on the system.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-07-30

Last Modified

2026-07-30

Generated

2026-07-31

AI Q&A

2026-07-31

EPSS Evaluated

N/A

NVD

CVE-2026-12942

EUVD

EUVD-2026-51243

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	langflow_oss	From 1.0.0 (inc) to 1.10.1 (inc)

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

This vulnerability is a directory traversal issue in IBM Langflow OSS versions 1.0.0 through 1.10.1. It allows a remote attacker to access files outside intended directories by sending a crafted URL with dot dot sequences like /../.

Detection Guidance

To detect this vulnerability, inspect network traffic for unusual URL patterns containing '/../' sequences. Check server logs for requests with directory traversal attempts. Use tools like curl to test endpoints: curl -v 'http://target/..//etc/passwd' to verify if arbitrary files can be accessed.

Impact Analysis

An attacker could exploit this to read sensitive files on the system, potentially exposing confidential data, configuration files, or other restricted information. This could lead to data breaches or unauthorized access.

Compliance Impact

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

Mitigation Strategies

Immediately update IBM Langflow OSS to version 1.10.2 or later. If an update is unavailable, restrict access to the application via network firewalls or reverse proxies. Monitor for suspicious activity and block known malicious IP patterns.

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