Vulnerability-Lookup

CVE-2026-81846 (GCVE-0-2026-81846)

Vulnerability from cvelistv5 – Published: 2026-09-01 19:04 – Updated: 2026-09-01 19:36

Title

runZero MCP 'Findings summaries' Data Leak

Summary

An authorization bypass in the runZero Platform MCP service has been resolved in version 5.1.260826.0. This issue is an instance of CWE-639: Authorization Bypass Through User-Controlled Key and has an estimated CVSS score of CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N (3.5 Low).

Severity

3.5 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CNA · runZero (v2.0.3)

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-01 19:36 UTC

CWE

CWE-639 - Authorization bypass through User-Controlled key

Assigner

runZero icscert root

References

2 references

URL	Tags
https://www.runzero.com/advisories/runzero-mcp-fi…	vendor-advisory
https://help.runzero.com/docs/release-notes/#512608260	release-notes

Impacted products

1 product

Vendor	Product	Version	CPE status
runZero	Platform	Affected: 4.0.251031.0 , ≤ 5.1.260825.0 (semver)	guessed

Date Public

2026-09-01 19:00

Credits

runZero, Inc.

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-81846

Vulnerability from fkie_nvd - Published: 2026-09-01 19:17 - Updated: 2026-09-01 20:17

Severity

3.5 (Low) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N

Summary

References

	URL	Tags
	44488dab-36db-4358-99f9-bc116477f914	https://help.runzero.com/docs/release-notes/#512608260
	44488dab-36db-4358-99f9-bc116477f914	https://www.runzero.com/advisories/runzero-mcp-findings-summaries-data-leak-cve-2026-81846

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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      "affectedData": [
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          "defaultStatus": "unaffected",
          "modules": [
            "Findings summaries"
          ],
          "product": "Platform",
          "vendor": "runZero",
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            {
              "lessThanOrEqual": "5.1.260825.0",
              "status": "affected",
              "version": "4.0.251031.0",
              "versionType": "semver"
            }
          ]
        }
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    }
  ],
  "id": "CVE-2026-81846",
  "lastModified": "2026-09-01T20:17:24.283",
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        "impactScore": 1.4,
        "source": "44488dab-36db-4358-99f9-bc116477f914",
        "type": "Secondary"
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GHSA-29CR-9CJX-C8CG

Vulnerability from github – Published: 2026-09-01 21:31 – Updated: 2026-09-01 21:31

Details

Severity

3.5 (Low)


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

Show details on source website

JSON

To clipboard

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  "affected": [],
  "aliases": [
    "CVE-2026-81846"
  ],
  "database_specific": {
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      "CWE-639"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-01T19:17:28Z",
    "severity": "LOW"
  },
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  "id": "GHSA-29cr-9cjx-c8cg",
  "modified": "2026-09-01T21:31:45Z",
  "published": "2026-09-01T21:31:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-81846"
    },
    {
      "type": "WEB",
      "url": "https://help.runzero.com/docs/release-notes/#512608260"
    },
    {
      "type": "WEB",
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    }
  ],
  "schema_version": "1.4.0",
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    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

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-2026-81846 (GCVE-0-2026-81846)

FKIE_CVE-2026-81846

GHSA-29CR-9CJX-C8CG

Tags

Sightings

Nomenclature