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Artemis CVE-2021-26118

HIGH
Improper Access Control (CWE-284)
2021-01-27 security@apache.org GHSA-q7fr-vqhq-v5xr
7.5
CVSS 3.1 · NVD
View

Vulnerability Assessment

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

1 technique across 1 tactic: Defense Evasion

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

Impact

CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 1.01%.

Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 1.0% exploitation probability (EPSS)

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AnalysisAI

While investigating ARTEMIS-2964 it was found that the creation of advisory messages in the OpenWire protocol head of Apache ActiveMQ Artemis 2.15.0 bypassed policy based access control for the. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affected Packages

maven org.apache.activemq:artemis-openwire-protocol fix: 2.16.0

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in maven

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

Technical ContextAI · show details

This vulnerability is classified under CWE-284. While investigating ARTEMIS-2964 it was found that the creation of advisory messages in the OpenWire protocol head of Apache ActiveMQ Artemis 2.15.0 bypassed policy based access control for the entire session. Production of advisory messages was not subject to access control in error. Affected products include: Apache Artemis, Netapp Oncommand Workflow Automation.

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Severity by source

NVD PRIMARY 7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

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
None
Integrity
High
Availability
None

DescriptionNVD

While investigating ARTEMIS-2964 it was found that the creation of advisory messages in the OpenWire protocol head of Apache ActiveMQ Artemis 2.15.0 bypassed policy based access control for the entire session. Production of advisory messages was not subject to access control in error.

Threat Intelligence Overview

EPSS Score
1.0%
Top 22% exploitable
Threat Intel
1
1 source
Data Quality
4 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 HIGH
CISA KEV No
Public POC No
EPSS 1.0%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
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· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

39
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)NVD

cpe:2.3:a:apache:artemis:2.15.0:*:*:*:*:*:*:*
cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*
CVE-2022-23913 HIGH POC
7.5 Feb 04

In Apache ActiveMQ Artemis prior to 2.20.0 or 2.19.1, an attacker could partially disrupt availability (DoS) through unc

CVE-2026-27446 CRITICAL
9.3 Mar 04

Unauthenticated remote attackers can exploit Apache ActiveMQ Artemis (2.11.0-2.44.0) and Apache Artemis (2.50.0-2.51.0)

CVE-2026-57967 CRITICAL
9.8 Sep 10

Session hijacking in Apache ActiveMQ Artemis and Apache Artemis allows unauthenticated remote attackers to steal authent

CVE-2021-26117 HIGH
7.5 Jan 27

The optional ActiveMQ LDAP login module can be configured to use anonymous access to the LDAP server. Rated high severit

CVE-2023-50780 HIGH
8.8 Oct 14

Apache ActiveMQ Artemis allows access to diagnostic information and controls through MBeans, which are also exposed thro

CVE-2026-67593 CRITICAL
9.1 Sep 10

Pre-authentication queue deletion in Apache Artemis and Apache ActiveMQ Artemis allows unauthenticated remote attackers

CVE-2026-49364 CRITICAL
9.1 Sep 10

Cluster credential exposure in Apache ActiveMQ Artemis and Apache Artemis allows a network-adjacent unauthenticated atta

CVE-2017-12174 HIGH
7.5 Mar 07

It was found that when Artemis and HornetQ before 2.4.0 are configured with UDP discovery and JGroups discovery a huge b

CVE-2022-35278 MEDIUM
6.1 Aug 23

In Apache ActiveMQ Artemis prior to 2.24.0, an attacker could show malicious content and/or redirect users to a maliciou

CVE-2026-49363 HIGH
7.5 Sep 10

Pre-authentication information disclosure in Apache ActiveMQ Artemis and Apache Artemis exposes cluster topology details

CVE-2026-49362 HIGH
7.5 Sep 10

Unauthenticated remote attackers can create arbitrary durable queues on Apache Artemis and Apache ActiveMQ Artemis broke

CVE-2021-4040 MEDIUM
5.3 Aug 24

A flaw was found in AMQ Broker. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authent

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