Vulnerability-Lookup

CVE-2026-86271 (GCVE-0-2026-86271)

Vulnerability from cvelistv5 – Published: 2026-09-07 04:30 – Updated: 2026-09-07 04:30

Title

FluentCMS PermissionManager.cs GetAccessible authorization

Summary

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.

Severity

5.1 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

4.7 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

4.7 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

CWE

CWE-862 - Missing Authorization
CWE-863 - Incorrect Authorization

Assigner

VulDB mitre root

References

6 references

URL	Tags
https://vuldb.com/vuln/399430	vdb-entrytechnical-description
https://vuldb.com/vuln/399430/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-86271	third-party-advisory
https://vuldb.com/submit/904824	third-party-advisory
https://github.com/fluentcms/FluentCMS/issues/2409	exploitissue-tracking
https://github.com/fluentcms/FluentCMS/	product

Impacted products

1 product

Vendor	Product	Version	CPE status
n/a	FluentCMS	Affected: 0.0.1 Affected: 0.0.2 Affected: 0.0.3 Affected: 0.0.4 Affected: 0.0.5 cpe:2.3:a:fluentcms:fluentcms::::::::

Credits

volksec (VulDB User) VulDB CNA Team

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:fluentcms:fluentcms:*:*:*:*:*:*:*:*"
          ],
          "product": "FluentCMS",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "0.0.1"
            },
            {
              "status": "affected",
              "version": "0.0.2"
            },
            {
              "status": "affected",
              "version": "0.0.3"
            },
            {
              "status": "affected",
              "version": "0.0.4"
            },
            {
              "status": "affected",
              "version": "0.0.5"
            }
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      "credits": [
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          "type": "reporter",
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          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
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          "cvssV4_0": {
            "baseScore": 5.1,
            "baseSeverity": "MEDIUM",
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        },
        {
          "name": "VDB-399430 | CTI Indicators (IOB, IOC, IOA)",
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          "time": "2026-09-06T14:56:08.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "FluentCMS PermissionManager.cs GetAccessible authorization",
      "x_generator": [
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    }
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  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
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    "cveId": "CVE-2026-86271",
    "datePublished": "2026-09-07T04:30:11.124Z",
    "dateReserved": "2026-09-06T12:51:03.719Z",
    "dateUpdated": "2026-09-07T04:30:11.124Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-86271\",\"sourceIdentifier\":\"cna@vuldb.com\",\"published\":\"2026-09-07T05:16:55.210\",\"lastModified\":\"2026-09-07T05:16:55.210\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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\":[{\"source\":\"cna@vuldb.com\",\"affectedData\":[{\"vendor\":\"n/a\",\"product\":\"FluentCMS\",\"cpes\":[\"cpe:2.3:a:fluentcms:fluentcms:*:*:*:*:*:*:*:*\"],\"versions\":[{\"version\":\"0.0.1\",\"status\":\"affected\"},{\"version\":\"0.0.2\",\"status\":\"affected\"},{\"version\":\"0.0.3\",\"status\":\"affected\"},{\"version\":\"0.0.4\",\"status\":\"affected\"},{\"version\":\"0.0.5\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\",\"baseScore\":2.0,\"baseSeverity\":\"LOW\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"LOW\",\"vulnIntegrityImpact\":\"LOW\",\"vulnAvailabilityImpact\":\"LOW\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"PROOF_OF_CONCEPT\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L\",\"baseScore\":4.7,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":1.2,\"impactScore\":3.4}],\"cvssMetricV2\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:M/C:P/I:P/A:P\",\"baseScore\":5.8,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"MULTIPLE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":6.4,\"impactScore\":6.4,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-862\"},{\"lang\":\"en\",\"value\":\"CWE-863\"}]}],\"references\":[{\"url\":\"https://github.com/fluentcms/FluentCMS/\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://github.com/fluentcms/FluentCMS/issues/2409\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/cve/CVE-2026-86271\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/submit/904824\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/vuln/399430\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/vuln/399430/cti\",\"source\":\"cna@vuldb.com\"}]}}"
  }
}

FKIE_CVE-2026-86271

Vulnerability from fkie_nvd - Published: 2026-09-07 05:16 - Updated: 2026-09-07 05:16

Severity

4.7 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

Summary

References

	URL	Tags
	cna@vuldb.com	https://github.com/fluentcms/FluentCMS/
	cna@vuldb.com	https://github.com/fluentcms/FluentCMS/issues/2409
	cna@vuldb.com	https://vuldb.com/cve/CVE-2026-86271
	cna@vuldb.com	https://vuldb.com/submit/904824
	cna@vuldb.com	https://vuldb.com/vuln/399430
	cna@vuldb.com	https://vuldb.com/vuln/399430/cti

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:fluentcms:fluentcms:*:*:*:*:*:*:*:*"
          ],
          "product": "FluentCMS",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "0.0.1"
            },
            {
              "status": "affected",
              "version": "0.0.2"
            },
            {
              "status": "affected",
              "version": "0.0.3"
            },
            {
              "status": "affected",
              "version": "0.0.4"
            },
            {
              "status": "affected",
              "version": "0.0.5"
            }
          ]
        }
      ],
      "source": "cna@vuldb.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "id": "CVE-2026-86271",
  "lastModified": "2026-09-07T05:16:55.210",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "MULTIPLE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.8,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:M/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 6.4,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "cna@vuldb.com",
        "type": "Secondary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 3.4,
        "source": "cna@vuldb.com",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 2.0,
          "baseSeverity": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "HIGH",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "LOW",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
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        },
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        "type": "Secondary"
      }
    ]
  },
  "published": "2026-09-07T05:16:55.210",
  "references": [
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/fluentcms/FluentCMS/"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/fluentcms/FluentCMS/issues/2409"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/cve/CVE-2026-86271"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/submit/904824"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/399430"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/399430/cti"
    }
  ],
  "sourceIdentifier": "cna@vuldb.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-862"
        },
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ],
      "source": "cna@vuldb.com",
      "type": "Primary"
    }
  ]
}

GHSA-PJ96-33W4-9MGG

Vulnerability from github – Published: 2026-09-07 06:30 – Updated: 2026-09-07 06:30

Details

Severity

4.7 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

2.0 (Low)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-86271"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-07T05:16:55Z",
    "severity": "LOW"
  },
  "details": "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.",
  "id": "GHSA-pj96-33w4-9mgg",
  "modified": "2026-09-07T06:30:24Z",
  "published": "2026-09-07T06:30:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86271"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fluentcms/FluentCMS/issues/2409"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fluentcms/FluentCMS"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-86271"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/904824"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/399430"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/399430/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-86271 (GCVE-0-2026-86271)

FKIE_CVE-2026-86271

GHSA-PJ96-33W4-9MGG

Tags

Sightings

Nomenclature