CVE-2026-67591: Apache Qpid ProtonJ2: Incoming session flow control window can be exceeded

["Timothy A. Bish" <tabish () apache org>]

Severity: important 

Affected versions:

- Apache Qpid ProtonJ2 (org.apache.qpid:protonj2) through 1.1.0

Description:

An authenticated attacker could exceed the session flow control incoming window potentially leading to denial of 
service.

This issue affects Apache Qpid ProtonJ2: through 1.1.0.

Users are recommended to upgrade to version 1.2.0, which fixes the issue.

References:

https://qpid.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-67591