CVE-2026-67553
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk21th percentile - higher than 21% of all known CVEs
Summary
In Apache Qpid Proton-Dotnet through 1.0.0, an authenticated attacker can exceed the session flow control incoming window, potentially leading to denial of service.
Risk Assessment
The vulnerability allows an attacker to overload sessions, potentially causing unavailability of services based on Proton-Dotnet.
Recommendation
Upgrade Apache Qpid Proton-Dotnet to version 1.1.0, which fixes the issue.
Other vulnerabilities in Apache Qpid Proton-Dotnet
See all- CVE-2026-67555Medium
In Apache Qpid Proton-Dotnet through 1.0.0, there is no limit on the maximum number of transfer frames per incoming delivery. An authenticated attacker can cause excessive resource usage and potential denial of service.
- CVE-2026-67554Medium
In Apache Qpid Proton-Dotnet through 1.0.0, 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.
- CVE-2026-67552High
A pre-authentication attacker could leverage type nesting to cause a StackOverflowError potentially leading to denial of service. This issue affects Apache Qpid Proton-Dotnet through 1.0.0. Users are recommended to upgrade to version 1.1.0, which fixes the issue.
- CVE-2026-67551High
A pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential denial of service. Affects Apache Qpid Proton-Dotnet through 1.0.0.
- CVE-2026-67465High
A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leading to denial of service. Affects Apache Qpid Proton-Dotnet through 1.0.0.
Original NVD description (English source)
An authenticated attacker could exceed the session flow control incoming window potentially leading to denial of service. This issue affects Apache Qpid Proton-Dotnet: through 1.0.0. Users are recommended to upgrade to version 1.1.0, which fixes the issue.