CVE-2026-8739 — Sanluan PublicCMS 5.202506.D Vulnerability
CVE-2026-8739 — A vulnerability was detected in Sanluan PublicCMS 5.202506.d. The affected element is the function getSignKey of the file publiccms-core/src/main/java/com/publiccms/logic/component/config/SafeConfigComponent.java. The manipulation of the argument privatefile_key results in use of har
What This Means For You
- If your environment is affected by CWE-320, CWE-321, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-8739 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-2026-8739 - Sanluan PublicCMS Hardcoded Key Usage
title: CVE-2026-8739 - Sanluan PublicCMS Hardcoded Key Usage
id: scw-2026-05-17-ai-1
status: experimental
level: high
description: |
This rule detects attempts to exploit CVE-2026-8739 in Sanluan PublicCMS by identifying requests targeting the vulnerable SafeConfigComponent.java file and specifically looking for the 'privatefile_key' parameter, which is manipulated to exploit the hard-coded cryptographic key vulnerability. This indicates an initial access attempt.
author: SCW Feed Engine (AI-generated)
date: 2026-05-17
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-8739/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/publiccms-core/src/main/java/com/publiccms/logic/component/config/SafeConfigComponent.java'
cs-uri-query|contains:
- 'privatefile_key'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-8739 | vulnerability | CVE-2026-8739 |
| CWE-320 | weakness | CWE-320 |
| CWE-321 | weakness | CWE-321 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 17, 2026 at 11:16 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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