CVE-2026-81846

runZero MCP 'Findings summaries' Data Leak

LOW
3.5
CVSS Score
Published: September 1, 2026 at 07:04 PM UTC
Updated: September 9, 2026 at 05:27 PM UTC
1 product affected across 1 vendorPlatform

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Severity
LOW3.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

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).

Affected

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

4.0.251031.0 ≤ v ≤ 5.1.260825.04.0.251031.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

Release Notes
Source: 44488dab-36db-4358-99f9-bc116477f914
https://help.runzero.com/docs/release-notes/#512608260

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

3.5LOWrunZero
Attack Vector
NETWORK
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-639

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