Vulnerability · Published Jun 30, 2026 · Assigned by apache
CVE-2026-49432Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp: STOMP negative content-length enables denial of service
High 7.5
In plain English
A high-severity improper input validation in Apache ActiveMQ from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Improper Input Validation vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp. A remote unauthenticated peer that can reach an exposed STOMP connector can trigger denial-of-service behavior by sending a negative content-length. For the NIO STOMP transport, an attacker can keep streaming body bytes and grow the per-connection command buffer beyond configured limits to cause OOM. For the blocking STOMP protocol, an error will instead force abnormal transport exception handling for the affected connection and closure. This issue affects Apache ActiveMQ: 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 Stomp: before 5.19.8, from 6.0.0 before 6.2.7. Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | activemq | no fix listed | DEBIAN-CVE-2026-49432 |
| Debian:13 | activemq | no fix listed | DEBIAN-CVE-2026-49432 |
| Maven | org.apache.activemq:activemq-all | 5.19.8 | GHSA-xjwq-9jw5-jf7w |
| Maven | org.apache.activemq:activemq-all | 6.2.7 | GHSA-xjwq-9jw5-jf7w |
| Maven | org.apache.activemq:activemq-stomp | 5.19.8 | GHSA-xjwq-9jw5-jf7w |
| Maven | org.apache.activemq:activemq-stomp | 6.2.7 | GHSA-xjwq-9jw5-jf7w |
| Maven | org.apache.activemq:apache-activemq | 5.19.8 | GHSA-xjwq-9jw5-jf7w |
| Maven | org.apache.activemq:apache-activemq | 6.2.7 | GHSA-xjwq-9jw5-jf7w |
| Ubuntu:24.04:LTS | activemq | no fix listed | UBUNTU-CVE-2026-49432 |
| Ubuntu:25.10 | activemq | no fix listed | UBUNTU-CVE-2026-49432 |
| Ubuntu:26.04:LTS | activemq | no fix listed | UBUNTU-CVE-2026-49432 |
| Ubuntu:26.10 | activemq | no fix listed | UBUNTU-CVE-2026-49432 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache ActiveMQ | 0 – before 5.19.86.0.0 – before 6.2.7 |
| Apache Software Foundation | Apache ActiveMQ All | 0 – before 5.19.86.0.0 – before 6.2.7 |
| Apache Software Foundation | Apache ActiveMQ Stomp | 0 – before 5.19.86.0.0 – before 6.2.7 |
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H