CVE-2026-86271

FluentCMS PermissionManager.cs GetAccessible authorization

MEDIUM
4.7
CVSS Score
Published: September 7, 2026 at 04:30 AM UTC
Updated: September 9, 2026 at 03:17 PM UTC
1 product affected across 1 vendorFluentCMS

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Severity
MEDIUM4.7
Exploit prediction
EPSS 0.4%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (6)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/399430
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/399430/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-86271
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/904824
ExploitIssue Tracking
Source: cverecord
https://github.com/fluentcms/FluentCMS/issues/2409

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.7MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-862CWE-863

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