CVE-2026-66273
published 2026-08-05CVE-2026-66273: A pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential denial of service. This issue affects…
PriorityP340high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.43%
36.0th percentile
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.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apache | qpid_proton-j | < 0.35.0 | 0.35.0 |
| apache | qpid_proton-j | — | — |
| apache_software_foundation | apache_qpid_proton-j | <= 0.34.1 | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vendor_redhat7.5HIGH
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Red Hat
org.apache.qpid/proton-j: Apache Qpid Proton-J: Denial of Service due to excessive allocation
vendor_redhat·2026-08-05·CVSS 7.5
CVE-2026-66273 [HIGH] CWE-770 org.apache.qpid/proton-j: Apache Qpid Proton-J: Denial of Service due to excessive allocation
org.apache.qpid/proton-j: Apache Qpid Proton-J: Denial of Service due to excessive allocation
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.
A flaw was found in Apache Qpid Proton-J. A remote attacker, without needing to authenticate, could exploit a vulnerability in how the software handles type sizes and counts. This could lead to excessive memory allocation, causing the system to become unresponsive and resulting in a denial of service.
Package: proton-j (Red Hat AMQ Broker 7) - Under investigation
Package: proton-j (Red Hat build of Apache Camel 4 for Quarkus 3
GHSA
A pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential denial of service.
ghsa_unreviewed·2026-08-05
CVE-2026-66273 CWE-789 A pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential denial of service.
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.
No detection rules found.
No public exploits indexed.
2026-08-05
Published