CVE-2026-12945

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Authenticated Access Control Bypass 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 allows authenticated users to access and manipulate other users' build jobs through improper access control on log retrieval and unauthenticated build endpoints.

CVSS Scores

EPSS Scores

Probability:
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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-2026-12945

EUVD

EUVD-2026-51242

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-639	The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

Attack-Flow Graph

Executive Summary

This vulnerability in IBM Langflow OSS 1.0.0 through 1.10.1 allows authenticated users to access and manipulate other users' build jobs due to improper access control on log retrieval and unauthenticated build endpoints.

Detection Guidance

To detect this vulnerability, check for unauthorized access to build jobs or logs in IBM Langflow OSS 1.0.0 through 1.10.1. Review user permissions and access logs for suspicious activity. Ensure authenticated endpoints are properly secured and unauthenticated build endpoints are restricted.

Impact Analysis

An attacker with access could view or alter other users' build jobs, potentially leading to data exposure, unauthorized modifications, or disruption of services.

Compliance Impact

This vulnerability could violate GDPR or HIPAA by allowing unauthorized access to sensitive data, leading to compliance breaches and potential legal consequences.

Mitigation Strategies

Update IBM Langflow OSS to a version beyond 1.10.1 to address improper access control issues. Restrict authenticated user permissions to prevent unauthorized access to build jobs and logs. Review and audit user roles and permissions regularly.

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