Ethical Hacking News
A high-severity vulnerability in Apache ActiveMQ Classic has been added to the Known Exploited Vulnerabilities (KEV) catalog by CISA, due to active exploitation in the wild. The vulnerability, tracked as CVE-2026-34197, could lead to code injection and is described as a case of improper input validation that could be exploited by threat actors. Organizations are advised to upgrade to version 5.19.4 or 6.2.3, which addresses the issue, and take proactive measures to secure their systems against potential breaches.
Apache ActiveMQ has been added to the Known Exploited Vulnerabilities (KEV) catalog by CISA due to a high-severity security flaw.The vulnerability, CVE-2026-34197, is a case of improper input validation that could lead to code injection.The vulnerability impacts versions 5.19.4 and below of Apache ActiveMQ Broker, as well as versions 5.19.4 and below of Apache ActiveMQ.Users are advised to upgrade to version 5.19.4 or 6.2.3 to address the issue.Exposed Jolokia management endpoints in Apache ActiveMQ Classic deployments are being actively targeted by threat actors.
Apache ActiveMQ, an open-source message broker widely used in enterprise environments, has been added to the Known Exploited Vulnerabilities (KEV) catalog by the U.S. Cybersecurity and Infrastructure Security Agency (CISA). This move comes as a result of a recently disclosed high-severity security flaw in Apache ActiveMQ Classic, which is currently under active exploitation in the wild.
The vulnerability, tracked as CVE-2026-34197, has been described as a case of improper input validation that could lead to code injection. According to Horizon3.ai's Naveen Sunkavally, this vulnerability has been "hiding in plain sight" for 13 years. It is essential to note that the vulnerability requires credentials but default credentials (admin:admin) are commonly used in many environments. On some versions, no credentials are required at all due to another vulnerability, CVE-2024-32114, which inadvertently exposes the Jolokia API without authentication.
This vulnerability impacts the following versions of Apache ActiveMQ:
* Apache ActiveMQ Broker (org.apache.activemq:activemq-broker) before 5.19.4
* Apache ActiveMQ Broker (org.apache.activemq:activemq-broker) 6.0.0 before 6.2.3
* Apache ActiveMQ (org.apache.activemq:activemq-all) before 5.19.4
* Apache ActiveMQ (org.apache.activemq:activemq-all) 6.0.0 before 6.2.3
To address this vulnerability, users are advised to upgrade to version 5.19.4 or 6.2.3, which addresses the issue. However, there are currently no details on how CVE-2026-34197 is being exploited in the wild, but SAFE Security has revealed that threat actors are actively targeting exposed Jolokia management endpoints in Apache ActiveMQ Classic deployments.
The findings once again demonstrate that exploitation timelines continue to collapse as attackers pounce upon newly disclosed vulnerabilities at an alarmingly faster rate and breach systems before they can be patched. This highlights the importance of regular vulnerability scanning, patching, and securing enterprise environments against such threats.
Apache ActiveMQ is a popular target for attacks, with flaws in the open-source message broker repeatedly exploited in various malware campaigns since 2021. In August 2025, a critical vulnerability in ActiveMQ (CVE-2023-46604, CVSS score: 10.0) was weaponized by unknown actors to drop a Linux malware called DripDropper.
"Given ActiveMQ's role in enterprise messaging and data pipelines, exposed management interfaces present a high-impact risk, potentially enabling data exfiltration, service disruption, or lateral movement," SAFE Security said. "Organizations should audit all deployments for externally accessible Jolokia endpoints, restrict access to trusted networks, enforce strong authentication, and disable Jolokia where it is not required."
In conclusion, the recent disclosure of CVE-2026-34197 in Apache ActiveMQ Classic has brought attention to the need for prompt patching and securing enterprise environments against such vulnerabilities. It is crucial for organizations to take proactive measures to mitigate these risks and protect their systems from potential breaches.
Related Information:
https://www.ethicalhackingnews.com/articles/The-Looming-Threat-of-Apache-ActiveMQ-A-High-Severity-Vulnerability-that-Could-Breach-Enterprise-Security-ehn.shtml
https://thehackernews.com/2026/04/apache-activemq-cve-2026-34197-added-to.html
https://windowsforum.com/threads/cisa-adds-cve-2026-34197-apache-activemq-to-kev-act-on-active-exploitation.413746/
https://nvd.nist.gov/vuln/detail/CVE-2023-46604
https://www.cvedetails.com/cve/CVE-2023-46604/
https://nvd.nist.gov/vuln/detail/CVE-2024-32114
https://www.cvedetails.com/cve/CVE-2024-32114/
https://nvd.nist.gov/vuln/detail/CVE-2026-34197
https://www.cvedetails.com/cve/CVE-2026-34197/
Published: Thu Apr 16 23:51:40 2026 by llama3.2 3B Q4_K_M
