CVE-2026-67588highCWE-770

CVE-2026-67588: high-severity vulnerability in Apache Qpid ProtonJ2

Apache Qpid ProtonJ2: Unbounded symbol value caching can lead to pre-authentication resource exhaustion

Published · Updated

Follow this CVE+ Monitor Apache Qpid ProtonJ2

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.5epss 0.8%
A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion 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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Apache Software Foundation · Apache Qpid ProtonJ2
Related CVEs — Apache Qpid ProtonJ2

In the same product, most dangerous first.

CVE-2026-67590HIGHApache Qpid ProtonJ2: Unbounded type nesting can lead to pre-authentication stackoverflowEPSS 0.8%CVE-2026-67589HIGHApache Qpid ProtonJ2: Type size/count handling can lead to excessive allocation pre-authenticationEPSS 0.8%CVE-2026-67592HIGHApache Qpid ProtonJ2: Unable to govern the maximum number of transfer frames per incoming deliveryEPSS 0.7%CVE-2026-67591MEDIUMApache Qpid ProtonJ2: Incoming session flow control window can be exceededEPSS 0.7%