CVE-2026-66276

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-J: through 0.34.1. Users are recommended to upgrade to version 0.35.0, which fixes the issue.

SeverityMedium

CVSS6.5

Exploit probability—

Product

Apache Qpid Proton-j

PublishedAug 5, 2026

First seenAug 5, 2026

Weakness typeCWE-606CWE-606

How to fix

Update

apache qpid_proton-j0.35.0 or later

Vendor advisories

lists.apache.org/thread/14nj0lpsqpnd3q0hw0t0tw44qvdo1jc2

Affected products

Product	Affected versions	Fixed in
apache qpid_proton-j	v < 0.35.0	0.35.0

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