CVE-2026-67551

EUVD-2026-53057
pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to 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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 41.42%
Affected Products (NVD)
VendorProductVersion
apacheqpid_proton-dotnet
𝑥
< 1.1.0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://lists.apache.org/thread/o566fhkrr3gg0lyzt24xwvz9w94oo6ro
http://www.openwall.com/lists/oss-security/2026/08/04/22