ActiveMQ Temporary Destination Isolation Bypass

Missing Authorization vulnerability in Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ. Apache ActiveMQ Classic temporary destinations are expected to be isolated to the connection that created them. The isolation can be broken as this is only checked in the client, allowing a different connection to consume from another connection's temporary destination. This issue affects Apache ActiveMQ Broker: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7. Users are recommended to upgrade to version 6.2.7, which fixes the issue.

Casky was already ahead

This CVE exploits attack patterns that Casky's 283matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

This missing authorization vulnerability in Apache ActiveMQ Classic breaks the intended isolation of temporary destinations between client connections. Temporary destinations should only be accessible to the connection that created them, but this check is enforced only on the client side, allowing attackers to consume messages from another connection's temporary destination without authorization. This affects Apache ActiveMQ Broker versions before 5.19.8 and 6.0.0 before 6.2.7, exposing organizations running these versions to unauthorized message interception, data theft, and potential denial of service. Any organization using ActiveMQ as a message broker in production environments faces risk of lateral movement and data exfiltration through this isolation bypass.

Casky's 283 matching skills detect the attack patterns underlying this vulnerability by mapping to MITRE ATT&CK techniques TA0004 (Privilege Escalation) and TA0006 (Credential Access). Using Claude AI with extended reasoning, practitioners would identify suspicious patterns such as: unauthorized connection attempts accessing temporary destination resources, cross-connection message consumption that violates expected isolation boundaries, and anomalous queue operations from unexpected sources. The skills would surface findings showing how an attacker leverages the client-side validation weakness to enumerate and access temporary destinations created by other sessions—a classic privilege escalation and data access technique. Security teams would see detailed attack chains revealing how threat actors move from initial broker access to lateral exploitation of message queues, enabling them to prioritize remediation toward patching vulnerable ActiveMQ instances and implementing network-level controls to restrict broker access.

Live Threat IntelligenceComing soon

Casky Risk Score

—

EPSS Probability

—

Shodan Exposure

—

GreyNoise Signal

—

Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →

283 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-54475.

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

Access with Stolen Session Cookie

penetration testing · medium

Run

MITRE ATT&CK Techniques

TA0004 TA0006

Investigate the attack patterns behind CVE-2026-54475

Casky has 283 skills that investigate the attack patterns behind CVE-2026-54475. Run one and get CVSS-scored findings in 3 minutes.

Run the skill that detects this →

X Instagram LinkedIn