CVE-2026-67591
Received Received - Intake

Denial of Service in Apache Qpid ProtonJ2

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 ProtonJ2: through 1.1.0. Users are recommended to upgrade to version 1.2.0, which fixes the issue.

CVSS Scores

EPSS Scores

Probability:
Percentile:

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-2026-67591
EUVD
EUVD-2026-53089

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
apache qpid_protonj2 to 1.2.0 (exc)
apache qpid_protonj2 1.2.0
apache qpid_protonj2 to 1.1.0 (exc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
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.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability allows an authenticated attacker to exceed the session flow control incoming window in Apache Qpid ProtonJ2 versions up to 1.1.0. This can lead to a denial of service by overwhelming the system's resources.

Detection Guidance

This vulnerability is specific to Apache Qpid ProtonJ2 versions through 1.1.0 and involves session flow control. Detection would require checking the installed version of Qpid ProtonJ2 on your system. If the version is 1.1.0 or earlier, the system is vulnerable.

Impact Analysis

If exploited, this vulnerability could cause your Apache Qpid ProtonJ2 service to become unresponsive or crash, disrupting normal operations and potentially leading to downtime.

Compliance Impact

This vulnerability could lead to denial of service due to session flow control issues, potentially disrupting services handling sensitive data. However, the provided context does not specify direct impacts on compliance with GDPR, HIPAA, or similar regulations.

Mitigation Strategies

Upgrade Apache Qpid ProtonJ2 to version 1.2.0 or later to address the session flow control vulnerability.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-67591. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart