Apache Qpid ProtonJ2 1.1.0 PreAuth StackOverflow via Type Nesting
CVE-2026-67590 Published on August 5, 2026
Apache Qpid ProtonJ2: Unbounded type nesting can lead to pre-authentication stackoverflow
A pre-authentication attacker could leverage type nesting to cause a StackOverflowError 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.
Vulnerability Analysis
CVE-2026-67590 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Stack Exhaustion Vulnerability?
The product does not properly control the amount of recursion which takes place, consuming excessive resources, such as allocated memory or the program stack.
CVE-2026-67590 has been classified to as a Stack Exhaustion vulnerability or weakness.
Affected Versions
Apache Software Foundation Apache Qpid ProtonJ2:- Before and including 1.1.0 is affected.