# CVE-2026-49432: Apache ActiveMQ denial of service in STOMP connector

Source: https://junglewise.ai/threats/cve-2026-49432-apache-activemq-denial-of-service-in-stomp-connector  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-30. Updated: 2026-06-30  
License: CC BY 4.0 with a link back

CVE-2026-49432 · Severity: high · CVSS 7.5 · Published 2026-06-30

Apache ActiveMQ, a widely used message broker for enterprise applications, is vulnerable to a denial-of-service attack. An unauthenticated remote attacker can send specially crafted messages to the STOMP connector to crash the service or exhaust its memory. This could lead to a complete disruption of message processing and communication between integrated business systems.

Technologies: [org.apache.activemq:activemq-all (Maven)](https://junglewise.ai/threats/technologies/org-apache-activemq-activemq-all), [org.apache.activemq:apache-activemq (Maven)](https://junglewise.ai/threats/technologies/org-apache-activemq-apache-activemq). Vendors: [Maven](https://junglewise.ai/threats/vendors/maven).

## Quick answers

**Is CVE-2026-49432 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-49432 being exploited in the wild.

**How severe is CVE-2026-49432?** High severity, with a CVSS score of 7.5, published 30 June 2026.

**Which products and versions are affected?** org.apache.activemq:activemq-all (Maven) < 5.19.8, ECOSYSTEM:introduced=0,fixed=5.19.8; org.apache.activemq:activemq-stomp (Maven) < 5.19.8, ECOSYSTEM:introduced=0,fixed=5.19.8; org.apache.activemq:apache-activemq (Maven) < 5.19.8, ECOSYSTEM:introduced=0,fixed=5.19.8.

**Is there a fix for CVE-2026-49432?** Yes. org.apache.activemq:activemq-all (Maven): upgrade to 5.19.8 or later; org.apache.activemq:activemq-stomp (Maven): upgrade to 5.19.8 or later; org.apache.activemq:apache-activemq (Maven): upgrade to 5.19.8 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-49432 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-49432?** Check whether you run org.apache.activemq:activemq-all (Maven), org.apache.activemq:activemq-stomp (Maven) or org.apache.activemq:apache-activemq (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- org.apache.activemq:activemq-all (Maven): upgrade to 5.19.8 or later

  ```sh
  # set org.apache.activemq:activemq-all to 5.19.8 in your pom.xml or build.gradle
  ```

- org.apache.activemq:activemq-stomp (Maven): upgrade to 5.19.8 or later

  ```sh
  # set org.apache.activemq:activemq-stomp to 5.19.8 in your pom.xml or build.gradle
  ```

- org.apache.activemq:apache-activemq (Maven): upgrade to 5.19.8 or later

  ```sh
  # set org.apache.activemq:apache-activemq to 5.19.8 in your pom.xml or build.gradle
  ```


## Technical details

An improper input validation vulnerability exists in the STOMP protocol implementation of Apache ActiveMQ. A remote unauthenticated attacker can reach an exposed STOMP connector and trigger denial-of-service behavior by providing a negative 'content-length' value. In the NIO STOMP transport, this allows an attacker to stream body bytes that grow the per-connection command buffer beyond configured limits, resulting in an Out-of-Memory (OOM) crash. In the blocking STOMP protocol, the error triggers abnormal transport exception handling that forces connection closure. The issue is resolved in versions 6.2.7 and 5.19.8.

## Affected products

- Apache Software Foundation Apache ActiveMQ before 5.19.8, 6.0.0 to 6.2.7
- Apache Software Foundation Apache ActiveMQ All before 5.19.8, 6.0.0 to 6.2.7
- Apache Software Foundation Apache ActiveMQ Stomp before 5.19.8, 6.0.0 to 6.2.7

## Identifiers

- CVE-2026-49432
- BIT-ACTIVEMQ-2026-49432
- GHSA-xjwq-9jw5-jf7w

## Timeline

- 2026-06-30: advisory
- 2026-06-30: disclosed

## References

- [https://repo.maven.apache.org/maven2](https://repo.maven.apache.org/maven2)
- [https://lists.apache.org/thread/fsjb26605syqr8xks249h8gkp86t55d2](https://lists.apache.org/thread/fsjb26605syqr8xks249h8gkp86t55d2)

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- [Apache ActiveMQ Denial of Service via Out of Memory](https://junglewise.ai/threats/cve-2026-50750-apache-activemq-denial-of-service-via-out-of-memory)
- [Apache ActiveMQ denial of service via excessive memory allocation](https://junglewise.ai/threats/cve-2026-50734-apache-activemq-denial-of-service-via-excessive-memory-allocation)