CVE-2026-67551

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://lists.apache.org/thread/o566fhkrr3gg0lyzt24xwvz9w94oo6ro	Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/08/04/22	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:apache:qpid_proton-dotnet:*:*:*:*:*:*:*:*

History

07 Aug 2026, 20:43

Type	Values Removed	Values Added
References	~~() https://lists.apache.org/thread/o566fhkrr3gg0lyzt24xwvz9w94oo6ro -~~	() https://lists.apache.org/thread/o566fhkrr3gg0lyzt24xwvz9w94oo6ro - Vendor Advisory
References	~~() http://www.openwall.com/lists/oss-security/2026/08/04/22 -~~	() http://www.openwall.com/lists/oss-security/2026/08/04/22 - Third Party Advisory
First Time		Apache Apache qpid Proton-dotnet
CPE		cpe:2.3:a:apache:qpid_proton-dotnet::::::::

06 Aug 2026, 22:18

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5

05 Aug 2026, 08:16

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/08/04/22 -

05 Aug 2026, 06:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-08-05 06:16

Updated : 2026-08-07 20:43

NVD link : CVE-2026-67551

Mitre link : CVE-2026-67551

CVE.ORG link : CVE-2026-67551

JSON object : View

Products Affected

apache

qpid_proton-dotnet

CWE

CWE-789

Memory Allocation with Excessive Size Value

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