CVE-2026-6542 MEDIUM

CVE-2026-6542: Monitor API allows cross-user read of transaction logs and deletion of build data via flow_id

Vendor Ibm
Product Langflow OSS
Weakness CWE-639 · IDOR
Published April 30, 2026
Last update May 1, 2026
View on NVD All CVEs

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

What the vulnerability does

01Description

IBM Langflow OSS 1.0.0 through 1.8.4 could allow any user to supply a flow_id to read transaction logs and vertex build data belonging to other users, and to delete persisted vertex build data for another user's flow.

Key dates

02Disclosure timeline

April 30, 2026 CVE published
May 1, 2026 Record updated