CVE-2026-66273: CWE-789 Memory Allocation with Excessive Size Value in Apache Software Foundation Apache Qpid Proton-J
A pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential 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.
AI Analysis
Technical Summary
This vulnerability (CWE-789) in Apache Qpid Proton-J involves improper handling of size or count values for memory allocation, which can be exploited by an unauthenticated attacker to trigger excessive memory allocation. This can cause a denial of service condition by exhausting system resources. The affected versions are all releases up to and including 0.34.1. The Apache Software Foundation has addressed this issue in version 0.35.0.
Potential Impact
An unauthenticated attacker can exploit this vulnerability to cause excessive memory allocation, leading to denial of service by resource exhaustion. There is no impact on confidentiality or integrity according to the CVSS vector.
Mitigation Recommendations
Users should upgrade Apache Qpid Proton-J to version 0.35.0 or later, where this vulnerability is fixed. No other mitigation or temporary workaround is indicated.
CVE-2026-66273: CWE-789 Memory Allocation with Excessive Size Value in Apache Software Foundation Apache Qpid Proton-J
Description
A pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential 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.
CVSS v3.1
Score 7.5high
Affected software
Apache Software Foundation
Apache Qpid Proton-J
pkg:maven/Apache Software Foundation/org.apache.qpid:proton-jRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-789) in Apache Qpid Proton-J involves improper handling of size or count values for memory allocation, which can be exploited by an unauthenticated attacker to trigger excessive memory allocation. This can cause a denial of service condition by exhausting system resources. The affected versions are all releases up to and including 0.34.1. The Apache Software Foundation has addressed this issue in version 0.35.0.
Potential Impact
An unauthenticated attacker can exploit this vulnerability to cause excessive memory allocation, leading to denial of service by resource exhaustion. There is no impact on confidentiality or integrity according to the CVSS vector.
Mitigation Recommendations
Users should upgrade Apache Qpid Proton-J to version 0.35.0 or later, where this vulnerability is fixed. No other mitigation or temporary workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-07-24T11:27:24.425Z
- State
- PUBLISHED
Threat ID: 6a72cd1dbf8831d5394f40b9
Added to database: 08/05/2026, 05:41:49 UTC
Last enriched: 08/12/2026, 15:01:50 UTC
Last updated: 09/17/2026, 22:01:37 UTC
Views: 29
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