Input validation error in ActiveMQ - CVE-2026-49432
Published: July 1, 2026
Vulnerability identifier: #VU136619
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-49432
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Apache Foundation
Affected software:
ActiveMQ
ActiveMQ
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper input validation in the STOMP connector when processing STOMP frames with a negative content-length. A remote attacker can send a specially crafted STOMP frame to cause a denial of service.
For the NIO STOMP transport, exploitation can grow the per-connection command buffer beyond configured limits and lead to out-of-memory conditions. For the blocking STOMP protocol, exploitation causes abnormal transport exception handling for the affected connection and its closure.
How to mitigate CVE-2026-49432
Install security update from vendor's website.