CVE-2026-42037 — Axios is a promise based HTTP client for the browser and

title: CVE-2026-42037 - Axios Multipart Header Injection
id: scw-2026-04-24-ai-1
status: experimental
level: high
description: |
  Detects exploitation attempts against CVE-2026-42037 in Axios. This rule looks for POST requests with 'multipart/form-data' in the URI query, originating from a referer indicating Axios usage, and containing CRLF sequences within the multipart body, which is indicative of header injection.
author: SCW Feed Engine (AI-generated)
date: 2026-04-24
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-42037/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/api/'
      cs-uri-query|contains:
          - 'multipart/form-data'
      referer|contains:
          - 'axios'
  selection_base:
      cs-method:
          - 'POST'
  selection_indicators:
      cs-uri-query|contains:
          - '\r
  Content-Disposition:'
      condition: selection AND selection_indicators
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse