CVE-2026-67588

Analyzed Analyzed - Analysis Complete

Denial of Service in Apache Qpid ProtonJ2

Publication date: 2026-08-05

Last updated on: 2026-08-07

Assigner: Apache Software Foundation

Description

A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion 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:
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Meta Information

Published

2026-08-05

Last Modified

2026-08-07

Generated

2026-08-16

AI Q&A

2026-08-05

EPSS Evaluated

2026-08-15

NVD

CVE-2026-67588

EUVD

EUVD-2026-53054

Affected Vendors & Products

Vendor	Product	Version / Range
apache	qpid_protonj2	to 1.2.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

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

Executive Summary

This vulnerability allows an attacker without authentication to exploit unbounded symbol value caching, causing resource exhaustion that leads to a denial of service.

Detection Guidance

This vulnerability is specific to Apache Qpid ProtonJ2 versions before 1.2.0. Detection involves checking the installed version of Qpid ProtonJ2 on your system. Use commands like 'qpid-protonj2 --version' or inspect package managers (e.g., 'dpkg -l | grep qpid-protonj2' for Debian/Ubuntu). If the version is below 1.2.0, the system is vulnerable.

Impact Analysis

An attacker could crash systems running vulnerable versions of Apache Qpid ProtonJ2, disrupting services and causing downtime.

Compliance Impact

The vulnerability causes resource exhaustion leading to denial of service, which could disrupt services handling sensitive data. This may impact compliance with standards like GDPR or HIPAA by compromising availability of systems processing personal or health information.

Mitigation Strategies

Upgrade Apache Qpid ProtonJ2 to version 1.2.0 or later to address the resource exhaustion vulnerability.

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