CVE-2026-67465: Apache Qpid Proton Dotnet: Unbounded symbol value caching can lead to pre-authentication resource exhaustion

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

Severity: important 

Affected versions:

- Apache Qpid Proton Dotnet (Apache.Qpid.Proton) through 1.0.0

Description:

A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leading to 
denial of service.

This issue affects Apache Qpid Proton-Dotnet: through 1.0.0.

Users are recommended to upgrade to version 1.1.0, which fixes the issue.

References:

https://qpid.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-67465