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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.

FluentCMS是FluentCMS组织的一个内容管理系统。 FluentCMS 0.0.5及之前版本存在授权问题漏洞，该漏洞源于对文件src/Backend/FluentCMS.Services/Permissions/PermissionManager.cs中GetAccessible函数的操作，可能导致缺少授权，攻击者可远程发起攻击。

CVSS 4.7 · Medium EPSS 0.40% · P33

Affected Version Matrix 5

VendorProduct Version RangeStatus
n/a FluentCMS 0.0.1 affected
0.0.2 affected
0.0.3 affected
0.0.4 affected
0.0.5 affected
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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
Vulnerability Title
FluentCMS 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FluentCMS是FluentCMS组织的一个内容管理系统。 FluentCMS 0.0.5及之前版本存在授权问题漏洞，该漏洞源于对文件src/Backend/FluentCMS.Services/Permissions/PermissionManager.cs中GetAccessible函数的操作，可能导致缺少授权，攻击者可远程发起攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- FluentCMS 0.0.1 cpe:2.3:a:fluentcms:fluentcms:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-86271

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III. Intelligence Information for CVE-2026-86271

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Patches & Fixes for CVE-2026-86271 (1)

Vendor Advisories for CVE-2026-86271 (1)

Vendor Pages for CVE-2026-86271 (1)

Other References for CVE-2026-86271 (2)

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 product: FluentCMS
Same vendor: n/a
Same weakness: CWE-862

V. Comments for CVE-2026-86271

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