Unrated severityNVD Advisory· Published Aug 5, 2026· Updated Aug 5, 2026
Apache Qpid Proton-J: Type size/count handling can lead to excessive allocation pre-authentication
CVE-2026-66273
Description
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.
Affected products
1- Range: <=0.34.1
Patches
Vulnerability mechanics
References
1- lists.apache.org/thread/z34s9v5w05qk4qqtz5fs3v9wpxz6fnbhmitrevendor-advisory
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