CVE-2026-81846

LOW 3.5

runZero MCP 'Findings summaries' Data Leak

CVSS Score

3.5

EPSS Score

0.0%

EPSS Percentile

0th

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).

CWE	CWE-639
Vendor	runzero
Product	platform
Published	Sep 1, 2026
Last Updated	Sep 1, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

runZero / Platform

4.0.251031.0 ≤ 5.1.260825.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

runzero.com: https://www.runzero.com/advisories/runzero-mcp-findings-summaries-data-leak-cve-2026-81846 help.runzero.com: https://help.runzero.com/docs/release-notes/#512608260

Credits

runZero, Inc.