CVE-2026-67590

Apache Qpid ProtonJ2: Unbounded type nesting can lead to pre-authentication stackoverflow

State: Published
Severity: 7.5 High
Published: Aug 5, 2026
Updated: Aug 6, 2026
Reserved: Jul 29, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-674 Uncontrolled Recursion

Affected Products

Product	Versions
Apache Qpid ProtonJ2Apache Software Foundation	1.1.0 and earlierAffected

References

https://lists.apache.org/thread/kmov6k7f3moqy01m1s370fl61vgos3lyvendor-advisory
http://www.openwall.com/lists/oss-security/2026/08/04/29

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