CVE-2026-6542

MEDIUM

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

Title source: cna

Description

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.

References (1)

[Vendor Advisory] https://www.ibm.com/support/pages/node/7270886

Scores

CVSS v3 6.5

EPSS 0.0003

EPSS Percentile 7.0%

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-639

Status published

Products (1)

IBM/Langflow OSS 1.0.0 - 1.8.4

Published Apr 30, 2026

Tracked Since May 01, 2026