CVE-2026-66275
Received Received - Intake

Denial of Service in Apache Qpid Proton-J

Publication date: 2026-08-05

Last updated on: 2026-08-05

Assigner: Apache Software Foundation

Description
An authenticated attacker could exceed the session flow control incoming window potentially 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.

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Meta Information

Published
2026-08-05
Last Modified
2026-08-05
Generated
2026-08-05
AI Q&A
2026-08-05
EPSS Evaluated
N/A
NVD
CVE-2026-66275
EUVD
EUVD-2026-53086

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
apache qpid_proton-j to 0.35.0 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-770 The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

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Executive Summary

This vulnerability allows an authenticated attacker to exceed the session flow control incoming window, which could lead to a denial of service condition. It affects Apache Qpid Proton-J versions up to and including 0.34.1.

Detection Guidance

This vulnerability is specific to Apache Qpid Proton-J and requires detecting version exposure. Check installed versions with commands like 'qpid-proton-j --version' or inspect package managers (e.g., 'rpm -qa | grep qpid' or 'dpkg -l | grep qpid'). If versions through 0.34.1 are found, the system is vulnerable.

Impact Analysis

An attacker could exploit this to disrupt service availability by overwhelming the system's session flow control, causing it to become unresponsive or crash.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards as it is a denial-of-service issue in Apache Qpid Proton-J. Compliance impacts would depend on system-specific implementations and mitigations rather than the vulnerability itself.

Mitigation Strategies

Upgrade Apache Qpid Proton-J to version 0.35.0 or later to address the session flow control vulnerability.

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