CVE-2026-41372 — OpenClaw before 2026.4.2 fails to normalize trailing-dot
CVE-2026-41372 — OpenClaw before 2026.4.2 fails to normalize trailing-dot localhost hosts in remote CDP discovery responses, allowing bypass of loopback protections. Attackers can craft hostile discovery responses returning localhost. to retarget authenticated browser control toward localhost endpoi
What This Means For You
- If your environment is affected by CWE-639, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-41372 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
1 rule · 6 SIEM formats1 detection rule auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-41372 - OpenClaw Trailing Dot Hostname Bypass
title: CVE-2026-41372 - OpenClaw Trailing Dot Hostname Bypass
id: scw-2026-04-28-ai-1
status: experimental
level: high
description: |
Detects OpenClaw CDP discovery responses that return a trailing-dot localhost hostname. This specific pattern indicates an attempt to exploit CVE-2026-41372 by bypassing loopback protections and potentially redirecting authenticated browser control to localhost endpoints.
author: SCW Feed Engine (AI-generated)
date: 2026-04-28
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-41372/
tags:
- attack.command_and_control
- attack.t1071.001
logsource:
category: webserver
detection:
selection:
dst_domain|endswith:
- '.localhost.'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-41372 | vulnerability | CVE-2026-41372 |
| CWE-639 | weakness | CWE-639 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 28, 2026 at 03:16 UTC |
This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.
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