CVE-2026-66273

A 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-J: through 0.34.1. Users are recommended to upgrade to version 0.35.0, 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/z34s9v5w05qk4qqtz5fs3v9wpxz6fnbh	Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/08/04/9	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

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

History

No history.

Information

Published : 2026-08-05 06:16

Updated : 2026-08-07 12:39

NVD link : CVE-2026-66273

Mitre link : CVE-2026-66273

CVE.ORG link : CVE-2026-66273

JSON object : View

Products Affected

apache

qpid_proton-j

CWE

CWE-789

Memory Allocation with Excessive Size Value

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