CVE-2026-66277 Apache Qpid Proton-J: Unable to govern the maximum number of transfer frames per incoming delivery

It was not possible to govern the maximum number of transfer frames per incoming delivery, enabling an authenticated attacker to cause excessive resource usage and potential denial of service. This issue affects Apache Qpid Proton-J: through 0.34.1. Users are recommended to upgrade to version...

CVE-2026-66276 Apache Qpid Proton-J: Unbounded disposition range handling can lead to denial of service

An authenticated attacker can craft a disposition frame with large or illegal ranges causing excessive CPU usage due to naive range handling, leading to 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...

EUVD-2026-53055

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...

Vulnerability of the transport.ssl methods in the Qpid Proton-J messaging library, which allows attackers to carry out “man-in-the-middle” attacks.

The vulnerability of the transport.ssl method in the Qpid Proton-J messaging library is related to errors in the certificate validation process. Exploiting this vulnerability could allow a malicious actor to carry out a “man-in-the-middle” attack...

GHSA-F5CF-F7PX-XPMH Moderate severity vulnerability that affects org.apache.qpid:proton-j

The 1 proton.reactor.Connector, 2 proton.reactor.Container, and 3 proton.utils.BlockingConnection classes in Apache Qpid Proton before 0.12.1 improperly use an unencrypted connection for an amqps URI scheme when SSL support is unavailable, which might allow man-in-the-middle attackers to obtain...