CVE-2026-9101 — Prototype pollution in csv parsing logic during import can

title: CVE-2026-9101 - Prototype Pollution leading to Shell Execution via csv Import
id: scw-2026-05-20-ai-1
status: experimental
level: critical
description: |
  This rule detects the execution of cmd.exe via 'start explorer.exe' or similar commands, often initiated by a vulnerable Electron application (like one with a flawed CSV import) after a prototype pollution vulnerability (CVE-2026-9101) has been exploited. The vulnerability allows untrusted file paths to be passed to shell.openExternal, which can then be leveraged to execute arbitrary commands.
author: SCW Feed Engine (AI-generated)
date: 2026-05-20
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-9101/
tags:
  - attack.execution
  - attack.t1059.004
logsource:
    category: process_creation
detection:
  selection:
      ParentImage|contains:
          - 'electron.exe'
      Image|contains:
          - 'cmd.exe'
      CommandLine|contains:
          - '/c'
          - 'start'
          - 'explorer.exe'
      condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse