CVE-2026-67555: Apache Qpid Proton Dotnet: Unable to govern the maximum number of transfer frames per incoming delivery

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-05 · updated 2026-10-23
Weakness: CWE-770

Description

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 Proton-Dotnet: through 1.0.0. Users are recommended to upgrade to version 1.1.0, which fixes the issue.

Affected products

Apache Software Foundation Apache Qpid Proton Dotnet: before 1.1.0 — fixed in 1.1.0

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Qpid Proton Dotnet 1.1.0. Check the vendor advisory for mitigations.

References

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