CVE-2026-66276
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk22th percentile - higher than 22% of all known CVEs
Summary
An authenticated attacker can craft a disposition frame with large or illegal ranges causing excessive CPU usage due to naive range handling, leading to denial of service. This issue affects Apache Qpid Proton-J through 0.34.1.
Risk Assessment
An attacker can overload the server, causing service unavailability for other users.
Recommendation
It is recommended to upgrade to version 0.35.0, which fixes the issue.
Other vulnerabilities in Apache Qpid Proton-J
See all- CVE-2026-66277Medium
In Apache Qpid Proton-J through 0.34.1, 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. The issue is fixed in version 0.35.0.
- CVE-2026-66275Medium
An authenticated attacker could exceed the session flow control incoming window potentially leading to 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.
- CVE-2026-66274High
A pre-authentication attacker could leverage type nesting to cause a StackOverflowError potentially leading to denial of service. Affects Apache Qpid Proton-J through 0.34.1.
- CVE-2026-66273High
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.
- CVE-2026-66257High
A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leading to 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.
Original NVD description (English source)
An authenticated attacker can craft a disposition frame with large or illegal ranges causing excessive CPU usage due to naive range handling, leading to 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.