What is the CVSS score of CVE-2026-22886?

CVE-2026-22886 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

How to fix or mitigate CVE-2026-22886?

Within 24 hours: Identify all OpenMQ instances in production and development environments; immediately change the default admin password to a strong, unique credential and document the change. Within 7 days: Implement network segmentation to restrict imqbrokerd TCP management service access to authorized administrative hosts only; enable authentication logging and alerting on failed login attempts. Within 30 days: Conduct forensic review of broker access logs for unauthorized activity; evaluate OpenMQ alternatives or migration timelines; establish baseline configuration management to prevent default credentials on future deployments.

Openmq CVE-2026-22886

CRITICAL

Use of Weak Credentials (CWE-1391)

2026-03-03 emo@eclipse.org

Information Disclosure Openmq Elipse

9.8

CVSS 3.1 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Discover OpenMQ imqbrokerd service port
Exploit

Authenticate with default admin/admin credentials
Execution

Execute administrative commands
Impact

Gain full broker control

Vulnerability Assessment

Weakness	CWE CWE-1391 OWASP Top 10:2025 A07:2025 - Authentication Failures ASVS 5.0 V6 - Authentication Strong credential management
Exploitation Conditions	OpenMQ imqbrokerd management service exposed on network with default credentials (admin/admin) not changed from installation. Service must be enabled and accessible on its default or configured TCP port.
Impact	CVSS 9.8.
Exploit ScenarioDerived	Login with default credentials to manage message queues.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Default admin credentials in OpenMQ message broker. Shipped with known default admin password.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 22:05 CVSS 9.8

Default credentials in OpenMQ.

RemediationAI

Change default credentials.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

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

Technical ContextAI · show details

CWE-1391 default credentials in message broker.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

OpenMQ exposes a TCP-based management service (imqbrokerd) that by default requires authentication. However, the product ships with a default administrative account (admin/ admin) and does not enforce a mandatory password change on first use. After the first successful login, the server continues to accept the default password indefinitely without warning or enforcement.

In real-world deployments, this service is often left enabled without changing the default credentials. As a result, a remote attacker with access to the service port could authenticate as an administrator and gain full control of the protocol’s administrative features.

Executive ViewAI

Why It Matters

OpenMQ deployments are vulnerable to unauthorized administrative access through a hardcoded default credential (admin/admin) that cannot be forced to change, allowing attackers to gain complete control of message broker infrastructure. This affects any organization running OpenMQ without manual credential rotation, potentially compromising data confidentiality, integrity, and availability across dependent applications.

Business Impact: Severe

Compensating Controls

Implement network-layer access controls restricting imqbrokerd management port to whitelisted administrative IP ranges only; disable or isolate the management service where operationally feasible; require VPN/bastion host access for broker administration; enable comprehensive audit logging of all management service connections and commands; implement intrusion detection rules monitoring for default credential authentication attempts; consider air-gapping affected systems pending patch availability.

Threat Intelligence Overview

EPSS Score

0.2%

Top 60% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

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 CRITICAL

CISA KEV No

Public POC No

EPSS 0.2%

Patch available No

Active threat No

Deciding rule

CRITICAL severity

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

Out-of-Cycle

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

Very High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +49

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

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