CVE-2026-86271— FluentCMS PermissionManager.cs GetAccessible authorization
Quick assessment
Affected
n/a FluentCMS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 FluentCMS 0.0.5 及更早版本中发现一个漏洞。该漏洞影响文件 中的 函数。通过特定操作可能导致授权检查缺失（即访问控制失效）。攻击者可以从远程发起攻击。利用该漏洞的方法已公开，因此可能被实际利用。项目方已通过问题报告提前获知此问题，但尚未作出回应。
Possible ATT&CK Techniques 2 AI
T1190 · Exploit Public-Facing Application T1210 · Exploitation of Remote Services
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I. Basic Information for CVE-2026-86271
Vulnerability Information
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Vulnerability Title
FluentCMS PermissionManager.cs GetAccessible authorization
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in FluentCMS up to 0.0.5. This affects the function GetAccessible of the file src/Backend/FluentCMS.Services/Permissions/PermissionManager.cs. Performing a manipulation results in missing authorization. It is possible to initiate the attack remotely. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | FluentCMS | 0.0.1 |
cpe:2.3:a:fluentcms:fluentcms:*:*:*:*:*:*:*:*
|
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II. Public POCs for CVE-2026-86271
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Patches & Fixes for CVE-2026-86271 (1)
Vendor Advisories for CVE-2026-86271 (1)
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🔗 CVE-2026-86271 FluentCMS PermissionManager.cs GetAccessible authorization Read full article vdb-entry technical-description
Vendor Pages for CVE-2026-86271 (1)
Other References for CVE-2026-86271 (2)
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🔗 CVE-2026-86271 in FluentCMS third-party-advisory
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Same Patch Batch · n/a · 2026-09-07 · 4 CVEs total
| CVE-2026-86289 | 4.3 MEDIUM | Ollama GGUF Decoder gguf.go readGGUFV1String integer overflow |
| CVE-2026-86285 | 4.3 MEDIUM | BookStack Attachment Edit Endpoint AttachmentController.php getUpdateForm access control |
| CVE-2026-86244 | 4.3 MEDIUM | FastAdmin User Controller User.php login cross site scripting |
IV. Related Vulnerabilities
Same vendor: n/a
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V. Comments for CVE-2026-86271
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