Uncontrolled Recursion in Apache Qpid ProtonJ2 - CVE-2026-67590
Published: August 25, 2026
Vulnerability identifier: #VU145168
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-2026-67590
CWE-ID: CWE-674
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 unbounded type nesting in the type parser when processing nested type data before authentication. A remote attacker can send specially crafted nested type input to cause a denial of service.
Affected software
Apache Qpid ProtonJ2
How to mitigate CVE-2026-67590
Install security update from vendor's website.
Apache Qpid ProtonJ2 - update to 1.2.0