CVE-2026-67588
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk39th percentile - higher than 39% of all known CVEs
Summary
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.
Risk Assessment
The vulnerability could allow an unauthenticated attacker to exhaust memory or other resources, leading to service unavailability.
Recommendation
Upgrade Apache Qpid ProtonJ2 to version 1.2.0 or later, which contains the fix.
Other vulnerabilities in Apache Qpid ProtonJ2
See all- CVE-2026-67592High
In Apache Qpid ProtonJ2 through 1.1.0, 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. Users are recommended to upgrade to version 1.2.0, which fixes the issue.
- CVE-2026-67591Medium
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.
- CVE-2026-67590High
A pre-authentication attacker could leverage type nesting to cause a StackOverflowError potentially leading to denial of service. Affects Apache Qpid ProtonJ2 through 1.1.0.
- CVE-2026-67589High
A pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential denial of service. Affects Apache Qpid ProtonJ2 through 1.1.0.
Original NVD description (English source)
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.