Medium [CVE-2026-66276] Denial of service via unbounded disposition range handling
This medium-severity Red Hat Linux advisory covers CVE-2026-66276 affecting Red Hat AMQ Broker 7, Red Hat build of Apache Camel 4 for Quarkus 3, Red Hat build of Apache Camel for Spring Boot 4.
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Summary
An authenticated attacker can craft a disposition frame with large or illegal ranges causing excessive CPU usage due to naive range handling, leading to denial of service. This issue affects Apache Qpid Proton-J: through 0.34.1.
Users are recommended to upgrade to version 0.35.0, which fixes the issue. All affected versions are set to AFFECTED/DEFER as the CVSS score (6.5) is below the 7.0 threshold for immediate remediation.
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-606.
Affected Red Hat products: Red Hat AMQ Broker 7; Red Hat build of Apache Camel 4 for Quarkus 3; Red Hat build of Apache Camel for Spring Boot 4; Red Hat build of Quarkus; Red Hat Fuse 7; Red Hat JBoss Enterprise Application Platform 8; Red Hat JBoss Enterprise Application Platform Expansion Pack. Red Hat does not currently list a fixing RHSA for this CVE.
- 0.34.1
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- Ensure authenticated access to AMQP endpoints is restricted to trusted clients.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
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