CVE-2026-67589

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 ProtonJ2: through 1.1.0. Users are recommended to upgrade to version 1.2.0, which fixes the issue.

Score

CVSS 3.1 7.5 High

Status

Analyzed - security@apache.org

Published

2026-08-05

Last modified

2026-10-24

Weaknesses

CWE-789

Affected products

• Qpid Protonj2 (Apache)
• Apache Qpid Protonj2 (Apache Software Foundation)

References

• https://lists.apache.org/thread/bs24x4778dh72xtfs299cy8krvdlo47q
• http://www.openwall.com/lists/oss-security/2026/08/04/28