CVE-2026-44373 — Path Traversal
CVE-2026-44373 — Nitro is a next generation server toolkit. Prior to 3.0.260429-beta, an attacker could bypass a proxy route rule by sending percent-encoded path traversal (..%2f) in the URL, causing Nitro to forward a request that the upstream resolved outside the configured scope. This vulnerabili
What This Means For You
- If your environment is affected by CWE-22, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-44373 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
2 rules · 6 SIEM formats2 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-44373 - Nitro Path Traversal Attempt
title: CVE-2026-44373 - Nitro Path Traversal Attempt
id: scw-2026-05-13-ai-1
status: experimental
level: high
description: |
Detects attempts to exploit CVE-2026-44373 by looking for percent-encoded path traversal sequences in the URL. This indicates an attacker is trying to bypass proxy route rules in Nitro server toolkit prior to version 3.0.260429-beta.
author: SCW Feed Engine (AI-generated)
date: 2026-05-13
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-44373/
tags:
- attack.reconnaissance
- attack.t1595.002
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '%2f..%2f'
- '%5c..%5c'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-44373 | vulnerability | CVE-2026-44373 |
| CWE-22 | weakness | CWE-22 |
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 14, 2026 at 00:16 UTC |
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