CVE-2026-6542 — IBM Langflow OSS 1.0.0 through 1.8.4 could allow any user

title: CVE-2026-6542 - Langflow OSS Unauthorized Transaction Log Access
id: scw-2026-04-30-ai-1
status: experimental
level: high
description: |
  Detects attempts to access transaction logs or vertex build data by supplying a flow_id parameter in the URI query string for IBM Langflow OSS versions 1.0.0 through 1.8.4. This targets the specific vulnerability allowing unauthorized data access.
author: SCW Feed Engine (AI-generated)
date: 2026-04-30
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-6542/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/api/v1/flows/'
      cs-uri-query|contains:
          - 'flow_id='
      cs-method:
          - 'GET'
  condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse