# CVE-2026-66276

## Summary

- **CVE ID:** CVE-2026-66276
- **Severity:** MEDIUM
- **CVSS Score:** 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-606
- **Published:** Aug 5, 2026
- **Last Modified:** Aug 6, 2026

## 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.

## Affected Products

- Apache Software Foundation — Apache Qpid Proton-J (0)

## References

- [CNA](https://lists.apache.org/thread/14nj0lpsqpnd3q0hw0t0tw44qvdo1jc2)
- [CVE](http://www.openwall.com/lists/oss-security/2026/08/04/12)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.42%
- **EPSS Percentile:** 35.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._