Vulnerability-Lookup

CVE-2026-84115 (GCVE-0-2026-84115)

Vulnerability from cvelistv5 – Published: 2026-09-01 15:00 – Updated: 2026-09-01 15:58

Title

Cleo Harmony JWT Refresh Token connections privileges management

Summary

A vulnerability was found in Cleo Harmony up to 5.8.1.10. The affected element is an unknown function of the file /api/connections of the component JWT Refresh Token Handler. Performing a manipulation of the argument Bearer results in improper privilege management. The attack is possible to be carried out remotely. The exploit has been made public and could be used. Upgrading to version 5.8.1.11 is sufficient to fix this issue. It is recommended to upgrade the affected component.

Severity

6.9 (Medium)


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

8.3 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L/E:P/RL:O/RC:C

8.3 (High)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L/E:P/RL:O/RC:C

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-01 15:58 UTC

CWE

CWE-269 - Improper Privilege Management
CWE-266 - Incorrect Privilege Assignment

Assigner

VulDB mitre root

References

5 references

URL	Tags
https://vuldb.com/vuln/397558	vdb-entrytechnical-description
https://vuldb.com/vuln/397558/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-84115	third-party-advisory
https://vuldb.com/submit/882468	third-party-advisory
https://support.cleo.com/hc/en-us/articles/302584…	broken-linkpatch

Impacted products

1 product

Vendor	Product	Version	CPE status
Cleo	Harmony	Affected: 5.8.1.0 Affected: 5.8.1.1 Affected: 5.8.1.2 Affected: 5.8.1.3 Affected: 5.8.1.4 Affected: 5.8.1.5 Affected: 5.8.1.6 Affected: 5.8.1.7 Affected: 5.8.1.8 Affected: 5.8.1.9 Affected: 5.8.1.10 Unaffected: 5.8.1.11 cpe:2.3:a:cleo:harmony::::::::

Credits

ilyass-armadin (VulDB User)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-84115

Vulnerability from fkie_nvd - Published: 2026-09-01 15:17 - Updated: 2026-09-01 20:47

Severity

8.3 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

Summary

References

	URL	Tags
	cna@vuldb.com	https://support.cleo.com/hc/en-us/articles/30258468834583-Cleo-Harmony-5-8-1-Release-Notes#Version58111
	cna@vuldb.com	https://vuldb.com/cve/CVE-2026-84115
	cna@vuldb.com	https://vuldb.com/submit/882468
	cna@vuldb.com	https://vuldb.com/vuln/397558
	cna@vuldb.com	https://vuldb.com/vuln/397558/cti
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://vuldb.com/submit/882468

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:cleo:harmony:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "JWT Refresh Token Handler"
          ],
          "product": "Harmony",
          "vendor": "Cleo",
          "versions": [
            {
              "status": "affected",
              "version": "5.8.1.0"
            },
            {
              "status": "affected",
              "version": "5.8.1.1"
            },
            {
              "status": "affected",
              "version": "5.8.1.2"
            },
            {
              "status": "affected",
              "version": "5.8.1.3"
            },
            {
              "status": "affected",
              "version": "5.8.1.4"
            },
            {
              "status": "affected",
              "version": "5.8.1.5"
            },
            {
              "status": "affected",
              "version": "5.8.1.6"
            },
            {
              "status": "affected",
              "version": "5.8.1.7"
            },
            {
              "status": "affected",
              "version": "5.8.1.8"
            },
            {
              "status": "affected",
              "version": "5.8.1.9"
            },
            {
              "status": "affected",
              "version": "5.8.1.10"
            },
            {
              "status": "unaffected",
              "version": "5.8.1.11"
            }
          ]
        }
      ],
      "source": "cna@vuldb.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability was found in Cleo Harmony up to 5.8.1.10. The affected element is an unknown function of the file /api/connections of the component JWT Refresh Token Handler. Performing a manipulation of the argument Bearer results in improper privilege management. The attack is possible to be carried out remotely. The exploit has been made public and could be used. Upgrading to version 5.8.1.11 is sufficient to fix this issue. It is recommended to upgrade the affected component."
    }
  ],
  "id": "CVE-2026-84115",
  "lastModified": "2026-09-01T20:47:54.130",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 7.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "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": 8.3,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.7,
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "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": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "LOW",
          "subConfidentialityImpact": "LOW",
          "subIntegrityImpact": "LOW",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/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",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-84115",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-01T15:58:17.546452Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-01T15:17:41.613",
  "references": [
    {
      "source": "cna@vuldb.com",
      "url": "https://support.cleo.com/hc/en-us/articles/30258468834583-Cleo-Harmony-5-8-1-Release-Notes#Version58111"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/cve/CVE-2026-84115"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/submit/882468"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/397558"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/397558/cti"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://vuldb.com/submit/882468"
    }
  ],
  "sourceIdentifier": "cna@vuldb.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-266"
        },
        {
          "lang": "en",
          "value": "CWE-269"
        }
      ],
      "source": "cna@vuldb.com",
      "type": "Secondary"
    }
  ]
}

GHSA-JG45-WRWH-X4RP

Vulnerability from github – Published: 2026-09-01 15:31 – Updated: 2026-09-01 15:31

Details

Severity

8.3 (High)


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

5.5 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-84115"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-266"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-01T15:17:41Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability was found in Cleo Harmony up to 5.8.1.10. The affected element is an unknown function of the file /api/connections of the component JWT Refresh Token Handler. Performing a manipulation of the argument Bearer results in improper privilege management. The attack is possible to be carried out remotely. The exploit has been made public and could be used. Upgrading to version 5.8.1.11 is sufficient to fix this issue. It is recommended to upgrade the affected component.",
  "id": "GHSA-jg45-wrwh-x4rp",
  "modified": "2026-09-01T15:31:15Z",
  "published": "2026-09-01T15:31:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84115"
    },
    {
      "type": "WEB",
      "url": "https://support.cleo.com/hc/en-us/articles/30258468834583-Cleo-Harmony-5-8-1-Release-Notes#Version58111"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-84115"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/882468"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/397558"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/397558/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/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-2026-84115 (GCVE-0-2026-84115)

FKIE_CVE-2026-84115

GHSA-JG45-WRWH-X4RP

Tags

Sightings

Nomenclature