Vulnerability record · CVE-2026-67554 · published 5 August 2026

CVE-2026-67554: Apache qpid proton-dotnet vulnerability

Apache · Qpid Proton Dotnet

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

6.5 CVSS 3.1 Medium EPSS 0.65% · top 50.8% CWE-606 · CWE-606

6.5CVSS 3.1 base score

0.65%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

2References

7 Aug 2026Last modified by NVD

Description

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Qpid Proton Dotnet Apache

References

Link	Tags
https://lists.apache.org/thread/5ndlowz29464ytj98gz9z9ljhwnmb2hm	Mailing ListVendor Advisory
http://www.openwall.com/lists/oss-security/2026/08/04/25	Mailing ListThird Party Advisory

Track CVE-2026-67554 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2026-67552Apache qpid proton-dotnet vulnerabilityA pre-authentication attacker could leverage type nesting to cause a StackOverflowError potentially leading to denial of service. This issue affects …EPSS 0.77%5 Aug 2026 7.5CVE-2026-67465Apache qpid proton-dotnet allocation without limits vulnerabilityA pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leading to denial of service. This issue aff…EPSS 0.77%5 Aug 2026 7.5CVE-2026-67551Apache qpid proton-dotnet vulnerabilitypre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential denial of service. This issue …EPSS 0.77%5 Aug 2026 6.5CVE-2026-67553Apache qpid proton-dotnet allocation without limits vulnerabilityAn authenticated attacker could exceed the session flow control incoming window potentially leading to denial of service. This issue affects Apache Q…EPSS 0.65%5 Aug 2026 6.5CVE-2026-67555Apache qpid proton-dotnet allocation without limits vulnerabilityIt was not possible to govern the maximum number of transfer frames per incoming delivery, enabling an authenticated attacker to cause excessive reso…EPSS 0.65%5 Aug 2026

Source: NIST National Vulnerability Database (record CVE-2026-67554), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.