Medium [CVE-2026-53917] Denial of Service via crafted OpenWire Message
This medium-severity Red Hat Linux advisory covers CVE-2026-53917 affecting Red Hat AMQ Broker 7, Red Hat AMQ Clients, Red Hat build of Apache Camel for Spring Boot 4.
Android app · Google Play
Monitor future Red Hat Linux CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.
Summary
Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker. An authenticated user can cause a broker DoS by sending a crafted OpenWire Message with a large encoded size value for the map.
OpenWire message property maps are unmarshaled without size validation which can trigger OOM and crash the broker. Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.
This lack of size validation during unmarshaling can lead to an out-of-memory error, causing the broker to crash and resulting in a Denial of Service (DoS). Red Hat products ship Apache ActiveMQ Classic components as transitive dependencies.
The vulnerability is in the OpenWire message property map unmarshalling code in activemq-client, which does not validate encoded size values, allowing an authenticated attacker to trigger OOM.
While AMQ Broker (Artemis) delegates OpenWire deserialization to Classic's activemq-client code, this attack requires authentication and has only moderate availability impact. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-770.
Affected products named by the advisory: Red Hat AMQ Broker 7; Red Hat AMQ Clients; Red Hat build of Apache Camel for Spring Boot 4; Red Hat Data Grid 8; and 6 more.
- < 5.19.8
- < 6.0.0
- < 6.2.7
Official advisory · high-confidence parse· fetched 12 days ago·verify at source
- 6.2.7
- 5.19.8
Official advisory · high-confidence parse· fetched 12 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Official advisory · high-confidence parse· fetched 12 days ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.