CVE-2026-67591

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.

Score

CVSS 3.1 6.5 Medium

Status

Analyzed - security@apache.org

Published

2026-08-05

Last modified

2026-10-24

Weaknesses

CWE-770

Affected products

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

References

• https://lists.apache.org/thread/rwmggh2bkm6qotxpdfcplht3jgw5n036
• http://www.openwall.com/lists/oss-security/2026/08/04/30