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Platform CVE-2026-5376

| EUVDEUVD-2026-19692 MEDIUM
Insufficient Session Expiration (CWE-613)
2026-04-07 runZero
5.9
CVSS 3.1 · Vendor: runZero
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V7 - Session Management Session expiration enforcement
Impact

The CVSS score of 5.9 (Medium) is driven by network-accessible attack vector (AV:N), high attack complexity (AC:H), and high privilege requirement (PR:H), combined with high confidentiality and integrity impacts (C:H/I:H). The PR:H constraint significantly limits real-world risk, as this vulnerability requires a currently authenticated high-privilege administrator account. The attack complexity is high, suggesting the automatic page reload condition must occur in a specific state. While no EPSS data or CISA KEV status is provided, the combination of authentication barrier, high complexity, and no public exploit code indicates this is a lower-priority remediation compared to unauthenticated or low-complexity vulnerabilities of similar CVSS score. The primary risk is insider threat or session hijacking scenarios where an attacker gains control of an admin session and exploits the timeout bypass; this is a real but constrained threat model.

Exploit ScenarioDerived

An authenticated administrator account is compromised or left unattended. An attacker leverages the automatic page reload feature to continuously refresh the application without triggering session inactivity timeout, maintaining access to administrative functions (user management, asset data modification, configuration changes) beyond the organization's intended session limit. The attacker could modify asset inventories, alter security settings, or extract sensitive network intelligence before the legitimate administrator detects the breach through other means.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Apr 07, 2026

Session inactivity timeouts fail to trigger in runZero Platform due to automatic page reloading, allowing authenticated administrators to maintain unauthorized access beyond intended session expiration windows. This CWE-613 resource control vulnerability affects runZero Platform versions prior to 4.0.260203.0 and requires high-privilege authentication, with confirmed confidentiality and integrity impacts. No public exploit code or active exploitation has been reported.

RemediationAI

Upgrade runZero Platform to version 4.0.260203.0 or later, which includes the fix for session timeout enforcement. Administrators should review release notes at https://help.runzero.com/docs/release-notes/#402602030 and apply the patch without delay. As an interim measure, disable automatic page reloading if the feature is configurable, or implement additional session monitoring and enforce manual re-authentication for sensitive operations. Refer to the official security advisory at https://www.runzero.com/advisories/runzero-platform-session-timeout-failure-cve-2026-5376/ for additional guidance.

Affected VersionsENISA

platform 0 <4.0.260203.0

Affected Packages

euvd platform fix: 4.0.260203.0

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 resides in runZero Platform's session management mechanism, specifically in the interaction between the session timeout controller and the automatic page reload function. CWE-613 (Insufficient Control of Resources After Expiration or Release) indicates the underlying defect: the session expiration timer is not properly enforced when automatic page reloading occurs, allowing session resources to persist beyond their intended lifetime. The affected product is the runZero Platform (CPE: cpe:2.3:a:runzero:platform:*:*:*:*:*:*:*:*), which is a network asset discovery and management solution. The flaw permits an authenticated high-privilege user to inadvertently or deliberately bypass inactivity-based session termination by allowing the application to continuously reload, effectively resetting the inactivity clock without re-authentication.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (runZero) PRIMARY 5.9 MEDIUM
AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/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
High
Integrity
High
Availability
None

Lifecycle Timeline

2
Patch available
Apr 16, 2026 - 05:29 EUVD
4.0.260203.0
CVE Published
Apr 07, 2026 - 14:11 nvd
MEDIUM 5.9

DescriptionCVE.org

An issue that could prevent session inactivity timeouts from triggering due to automatic page reloading has been resolved. This is an instance of CWE-613: Insufficient Control of Resources After Expiration or Release, and has an estimated CVSS score of CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N (5.9 Medium). This issue was fixed in version 4.0.260203.0 of the runZero Platform.

Threat Intelligence Overview

EPSS Score
0.0%
Top 93% 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 MEDIUM
CISA KEV No
Public POC No
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
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
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Total

Priority Score

30
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +30
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

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