CVE-2026-67554

Medium

Description

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.

SeverityMedium

CVSS6.5

Exploit probability51. percentile0.7%

Product

Apache Qpid Proton-dotnet

PublishedAug 5, 2026

First seenAug 5, 2026

Weakness typeCWE-606CWE-606

How to fix

Update

apache qpid_proton-dotnet1.1.0 or later

Vendor advisories

lists.apache.org/thread/5ndlowz29464ytj98gz9z9ljhwnmb2hm

Affected products

Product	Affected versions	Fixed in
apache qpid_proton-dotnet	v < 1.1.0	1.1.0

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