CVE-2026-66273: Apache Qpid Proton-J: Type size/count handling can lead to excessive allocation pre-authentication

[Robbie Gemmell <robbie () apache org>]

Severity: important 

Affected versions:

- Apache Qpid Proton-J (org.apache.qpid:proton-j) through 0.34.1

Description:

A pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to 
potential 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.

References:

https://qpid.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-66273