CVE-2026-66276

EUVD-2026-53090
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
apacheCNA
UNKNOWN
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 6%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
apacheqpid_proton-j
𝑥
≤ 0.34.1
CNA
Common Weakness Enumeration
References
https://lists.apache.org/thread/14nj0lpsqpnd3q0hw0t0tw44qvdo1jc2
http://www.openwall.com/lists/oss-security/2026/08/04/12