Vulnerability Details CVE-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 Apache Qpid Proton-J: through 0.34.1.
Users are recommended to upgrade to version 0.35.0, which fixes the issue.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 35.2%
CVSS Severity
CVSS v3 Score 7.5
References
Products affected by CVE-2026-66273
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cpe:2.3:a:apache:qpid_proton-j:0.1
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cpe:2.3:a:apache:qpid_proton-j:0.10
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cpe:2.3:a:apache:qpid_proton-j:0.11.0
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cpe:2.3:a:apache:qpid_proton-j:0.11.1
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cpe:2.3:a:apache:qpid_proton-j:0.12.0
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cpe:2.3:a:apache:qpid_proton-j:0.12.1
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cpe:2.3:a:apache:qpid_proton-j:0.12.2
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cpe:2.3:a:apache:qpid_proton-j:0.13.0
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cpe:2.3:a:apache:qpid_proton-j:0.13.1
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cpe:2.3:a:apache:qpid_proton-j:0.14.0
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cpe:2.3:a:apache:qpid_proton-j:0.15.0
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cpe:2.3:a:apache:qpid_proton-j:0.16.0
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cpe:2.3:a:apache:qpid_proton-j:0.17.0
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cpe:2.3:a:apache:qpid_proton-j:0.18.0
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cpe:2.3:a:apache:qpid_proton-j:0.19.0
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cpe:2.3:a:apache:qpid_proton-j:0.2
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cpe:2.3:a:apache:qpid_proton-j:0.20.0
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cpe:2.3:a:apache:qpid_proton-j:0.21.0
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cpe:2.3:a:apache:qpid_proton-j:0.22.0
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cpe:2.3:a:apache:qpid_proton-j:0.23.0
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cpe:2.3:a:apache:qpid_proton-j:0.24.0
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cpe:2.3:a:apache:qpid_proton-j:0.25.0
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cpe:2.3:a:apache:qpid_proton-j:0.26.0
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cpe:2.3:a:apache:qpid_proton-j:0.27.0
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cpe:2.3:a:apache:qpid_proton-j:0.27.1
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cpe:2.3:a:apache:qpid_proton-j:0.27.2
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cpe:2.3:a:apache:qpid_proton-j:0.27.3
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cpe:2.3:a:apache:qpid_proton-j:0.28.0
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cpe:2.3:a:apache:qpid_proton-j:0.28.1
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cpe:2.3:a:apache:qpid_proton-j:0.29.0
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cpe:2.3:a:apache:qpid_proton-j:0.3
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cpe:2.3:a:apache:qpid_proton-j:0.30.0
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cpe:2.3:a:apache:qpid_proton-j:0.31.0
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cpe:2.3:a:apache:qpid_proton-j:0.32.0
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cpe:2.3:a:apache:qpid_proton-j:0.33.0
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cpe:2.3:a:apache:qpid_proton-j:0.33.1
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cpe:2.3:a:apache:qpid_proton-j:0.33.10
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cpe:2.3:a:apache:qpid_proton-j:0.33.2
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cpe:2.3:a:apache:qpid_proton-j:0.33.3
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cpe:2.3:a:apache:qpid_proton-j:0.33.4
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cpe:2.3:a:apache:qpid_proton-j:0.33.5
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cpe:2.3:a:apache:qpid_proton-j:0.33.6
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cpe:2.3:a:apache:qpid_proton-j:0.33.7
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cpe:2.3:a:apache:qpid_proton-j:0.33.8
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cpe:2.3:a:apache:qpid_proton-j:0.33.9
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cpe:2.3:a:apache:qpid_proton-j:0.34.0
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cpe:2.3:a:apache:qpid_proton-j:0.34.1
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cpe:2.3:a:apache:qpid_proton-j:0.4
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cpe:2.3:a:apache:qpid_proton-j:0.5
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cpe:2.3:a:apache:qpid_proton-j:0.6
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cpe:2.3:a:apache:qpid_proton-j:0.7
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cpe:2.3:a:apache:qpid_proton-j:0.8
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cpe:2.3:a:apache:qpid_proton-j:0.9
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cpe:2.3:a:apache:qpid_proton-j:0.9.1