CVE-2026-6542CWE-639

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

Medium · published April 30, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
27.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00354 · 27.9th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-04-30T21:16Z
EPSS history
Timeline
  • 30 APR 21:16Z
    Monitor API allows cross-user read of transaction logs and deletion of build data via flow_id
    cvelistv5