CVE-2026-66273

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Source
https://cve.org/CVERecord?id=CVE-2026-66273
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66273.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-66273
Published
2026-08-05T05:23:31.964Z
Modified
2026-08-12T03:51:16.392382985Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Apache Qpid Proton-J: Type size/count handling can lead to excessive allocation pre-authentication
Details

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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66273.json",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "last_affected": "0.34.1"
                }
            ]
        },
        {
            "source": "DESCRIPTION",
            "extracted_events": [
                {
                    "fixed": "0.34.1"
                }
            ]
        }
    ],
    "cna_assigner": "apache",
    "cwe_ids": [
        "CWE-789"
    ]
}
References

Affected packages

Git / github.com/apache/qpid-proton-j

Affected ranges

Type
GIT
Repo
https://github.com/apache/qpid-proton-j
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
743eecb20a8d7592d953147984c3e84b9d05b070
Database specific
Show details 
{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:apache:qpid_proton-j:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.35.0"
        }
    ]
}

Affected versions

0.*
0.17.0
0.18.0
0.19.0
0.20.0
0.21.0
0.22.0
0.23.0
0.24.0
0.25.0
0.26.0
0.27.0
0.27.0-rc1
0.27.0-rc2
0.27.1
0.28.0
0.28.1
0.29.0
0.30.0
0.31.0
0.32.0
0.33.0
0.33.1
0.33.10
0.33.2
0.33.3
0.33.4
0.33.5
0.33.6
0.33.7
0.33.8
0.33.9
0.34.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66273.json"