CVE-2026-3346 — Cross-Site Scripting (XSS)

title: IBM Langflow Stored XSS Attempt via Web UI - CVE-2026-3346
id: scw-2026-04-30-ai-1
status: experimental
level: high
description: |
  Detects attempts to inject JavaScript code into the IBM Langflow Web UI, specifically targeting the chat completions API endpoint. This is indicative of the stored XSS vulnerability (CVE-2026-3346) where an authenticated user could embed malicious scripts to alter functionality or steal credentials within a trusted session.
author: SCW Feed Engine (AI-generated)
date: 2026-04-30
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-3346/
tags:
  - attack.initial_access
  - attack.t1189
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/api/v1/chat/completions'
      cs-method:
          - 'POST'
      cs-uri-query|contains:
          - '<script>'
      condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse