Resource exhaustion in Apache Qpid Proton-J - CVE-2026-66257
Published: August 24, 2026
Vulnerability identifier: #VU144808
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2026-66257
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in symbol value caching when processing AMQP data. A remote attacker can send input that triggers unbounded symbol value caching to cause a denial of service.
The issue can be exploited prior to authentication.
Affected software
Apache Qpid Proton-J
How to mitigate CVE-2026-66257
Install security update from vendor's website.
Apache Qpid Proton-J - update to 0.35.0