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Platform CVE-2026-5381

| EUVDEUVD-2026-19698 LOW
Incorrect Authorization (CWE-863)
2026-04-07 runZero GHSA-hm34-jchw-p8x7
2.2
CVSS 3.1 · Vendor: runZero
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization logic validation
MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

While the CVSS score of 2.2 is low, the risk assessment must account for multiple data points: (1) the vector shows authentication is required (PR:H, high-privilege user), significantly limiting the attack surface; (2) attack complexity is high (AC:H), meaning successful exploitation requires specific conditions; (3) impact is limited to confidentiality with only low-level information disclosure (C:L); (4) no KEV (CISA Known Exploited Vulnerabilities) status is indicated, and no public exploit code is referenced; (5) the defect affects task metadata rather than critical system functions or credentials. This is a genuine but constrained authorization bypass relevant primarily to organizations with multi-tenant or multi-org deployments of runZero where administrative users might maliciously or inadvertently probe cross-organization data. Real-world risk is proportional to the sensitivity of task information and the trustworthiness of high-privilege users within each organization.

Exploit ScenarioDerived

A high-privileged administrator within one organization of a multi-tenant runZero deployment could craft API requests or use the platform interface to enumerate or retrieve task information from other organizations within the same instance. While the high authentication barrier (PR:H) and high complexity (AC:H) limit the likelihood, an insider with administrative privileges or a compromised admin account could use this flaw to conduct corporate espionage or gather sensitive information about other organizations' network scanning activities. No public proof-of-concept or active exploitation is known.

Monitor Track and reassess. Why: LOW severity (CVSS 0.1-3.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Apr 07, 2026

runZero Platform versions prior to 4.0.260205.0 contain an incorrect authorization flaw that allows authenticated high-privileged users to access task information outside their authorized organization scope via network-based vectors with high complexity. The vulnerability is low-severity (CVSS 2.2) and limited to confidentiality impact (information disclosure), with no public exploit identified at time of analysis.

RemediationAI

Vendor-released patch: upgrade runZero Platform to version 4.0.260205.0 or later. This version includes the authorization controls fix to prevent cross-organization task information disclosure. Organizations should review the official runZero advisory at https://www.runzero.com/advisories/runzero-platform-task-infoleak-cve-2026-5381/ and release notes at https://help.runzero.com/docs/release-notes/#402602050 for deployment guidance. No interim workarounds are documented; patching is the primary remediation path.

Affected VersionsENISA

platform 0 <4.0.260205.0

Affected Packages

euvd platform fix: 4.0.260205.0

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The vulnerability stems from CWE-863 (Incorrect Authorization), a category of flaw where an application fails to properly validate that a user has permission to access requested resources. In this case, the runZero Platform's task information retrieval mechanism does not adequately enforce organization-level access controls, allowing high-privileged users authenticated to the system to query or retrieve task data belonging to other organizations. The network-based attack vector combined with high complexity suggests the exploitation requires specific conditions or knowledge of the platform's API/interface, but no special user interaction (UI:N) is needed once authenticated.

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Severity by source

Vendor (runZero) PRIMARY 2.2 LOW
AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N

Primary rating from Vendor (runZero) · only source for this CVE.

CVSS VectorVendor: runZero

Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

2
Patch available
Apr 16, 2026 - 05:29 EUVD
4.0.260205.0
CVE Published
Apr 07, 2026 - 14:12 nvd
LOW 2.2

DescriptionCVE.org

An issue that could expose task information outside of the authorized organization scope has been resolved. This is an instance of CWE-863: Incorrect Authorization, and has an estimated CVSS score of CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N (2.2 Low). This issue was fixed in version 4.0.260205.0 of the runZero Platform.

Threat Intelligence Overview

EPSS Score
0.0%
Top 94% exploitable
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity LOW
CISA KEV No
Public POC No
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
LOW severity (CVSS 0.1-3.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Low
Technical Impact
Partial

Priority Score

11
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +11
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

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