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CVE-2026-67589

Apache Qpid ProtonJ2: Type size/count handling can lead to excessive allocation pre-authentication

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 ProtonJ2: through 1.1.0. Users are recommended to upgrade to version 1.2.0, which fixes the issue.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Apache
Products
Qpid Proton-j Qpid Protonj2
CVE-2026-67590

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.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Apache
Products
Qpid Proton-j Qpid Protonj2
CVE-2026-67591

Apache Qpid ProtonJ2: Incoming session flow control window can be exceeded

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.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Apache
Products
Qpid Proton-j Qpid Protonj2
CVE-2026-67592

Apache Qpid ProtonJ2: Unable to govern the maximum number of transfer frames per incoming delivery

It was not possible to govern the maximum number of transfer frames per incoming delivery, enabling an authenticated attacker to cause excessive resource usage and potential 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 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Apache
Products
Qpid Proton-j Qpid Protonj2
CVE-2026-67588

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

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 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Apache
Products
Qpid Proton-j Qpid Protonj2