What is CVE-2026-67555?

CVE-2026-67555 is a medium-severity vulnerability in Apache Qpid Proton-Dotnet, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-08-05.

How severe is CVE-2026-67555?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Apache Qpid Proton-Dotnet

CVE-2026-67555

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.

EPSS: 0.004 (35.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Apache Qpid_proton-dotnet
Apache Software Foundation Qpid Proton Dotnet — versions 0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

security@apache.org (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-67555?: CVE-2026-67555 is a medium-severity vulnerability in Apache Qpid Proton-Dotnet, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-08-05.
How severe is CVE-2026-67555?: Medium severity. CVSS v3 base score is 6.5 out of 10.