CVE-2026-42291 — SysReptor is a fully customizable pentest reporting
CVE-2026-42291 — SysReptor is a fully customizable pentest reporting platform. From version 2026.4 to before version 2026.27, the endpoints for reading and creating sharing links for personal notes is not properly authorized. This allows authenticated attackers who obtain the note ID of victim users
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-2026-42291 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 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-2026-42291 - SysReptor Unauthenticated Note Sharing Link Creation
title: CVE-2026-42291 - SysReptor Unauthenticated Note Sharing Link Creation
id: scw-2026-05-08-ai-1
status: experimental
level: high
description: |
Detects the creation of sharing links for personal notes in SysReptor versions prior to 2026.27. This is a direct indicator of the CVE-2026-42291 vulnerability being exploited, allowing authenticated attackers to gain unauthorized access to other users' notes.
author: SCW Feed Engine (AI-generated)
date: 2026-05-08
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-42291/
tags:
- attack.lateral_movement
- attack.t1133
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/api/notes/share'
cs-method|exact:
- 'POST'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-42291 | vulnerability | CVE-2026-42291 |
| CWE-639 | weakness | CWE-639 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 09, 2026 at 02:16 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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