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Apache ActiveMQ CVE-2026-61487

CRITICAL
2026-07-27
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Severity by source

vuln.today AI
6.5 MEDIUM

Network accessible, low complexity, requires low privileges, no user interaction, only integrity impact (unauthorized message injection).

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Lifecycle Timeline

2
Analysis Generated
Jul 27, 2026 - 18:15 vuln.today
CVE Published
Jul 27, 2026 - 17:30 oss-security
CRITICAL

Description PRE-NVD

Disclosed via oss-security. NVD scoring and full description are pending.

AnalysisAI

Authorization bypass in Apache ActiveMQ 5.x before 5.19.9 and 6.x before 6.2.8 allows authenticated low-privilege users to publish messages to any queue without proper write ACLs by abusing temporary composite destinations. This enables unauthorized message injection into restricted queues, potentially disrupting message integrity and business logic. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate as low-privilege JMS client
Delivery
Create temporary composite destination with comma-separated queue names
Exploit
Send message to composite destination
Execution
Broker skips write ACL check
Impact
Message published to all listed queues unauthorized

Vulnerability AssessmentAI

Exploitation Requires an authenticated low-privilege user with network access to the broker and the ability to create temporary destinations (default for JMS clients). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The vulnerability requires network access and authentication as a low-privilege user, with no user interaction and low attack complexity. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with low-privilege authenticated access to the ActiveMQ broker creates a JMS session and constructs a temporary composite destination whose name is a comma-separated list of high-value target queues. They then publish a malicious or spam message to this composite destination; the broker delivers it to all listed queues without verifying write permissions, circumventing ACL restrictions. …
Remediation Upgrade to Apache ActiveMQ 5.19.9, 6.2.8, or 6.3.0, which include the fix. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-61487 vulnerability details – vuln.today

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