Apache · Qpid Protonj2 · CVE-2026-67589
**Name of the Vulnerable Software and Affected Versions**
Apache Qpid ProtonJ2 versions prior to 1.2.0
**Description**
A pre-authentication attacker can exploit the way type size and count are handled to trigger excessive memory allocation, which may result in a denial of service.
**Recommendations**
Upgrade to version 1.2.0.