{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-50734", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-06-05T17:01:29.414Z", "datePublished": "2026-06-30T09:53:03.435Z", "dateUpdated": "2026-06-30T11:06:17.570Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://repo.maven.apache.org/maven2", "defaultStatus": "unaffected", "packageName": "org.apache.activemq:activemq-client", "product": "Apache ActiveMQ Client", "vendor": "Apache Software Foundation", "versions": [{"lessThan": "5.19.8", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThan": "6.2.7", "status": "affected", "version": "6.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "packageName": "org.apache.activemq:apache-activemq", "product": "Apache ActiveMQ", "vendor": "Apache Software Foundation", "versions": [{"lessThan": "5.19.8", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThan": "6.2.7", "status": "affected", "version": "6.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "packageName": "org.apache.activemq:activemq-all", "product": "Apache ActiveMQ All", "vendor": "Apache Software Foundation", "versions": [{"lessThan": "5.19.8", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThan": "6.2.7", "status": "affected", "version": "6.0.0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Andrej Tomci"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All.</p><span style=\"background-color: rgb(255, 255, 255);\">An unauthenticated network attacker can cause a broker DoS by sending a crafted WireFormatInfo frame with a malicious large size value. The value is not validate and causes the broker to attempt allocation during pre-auth negotiation which can trigger OOM and crash the broker.</span><br><p>This issue affects Apache ActiveMQ Client: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7.</p><p>Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.</p>"}], "value": "Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All.\n\nAn unauthenticated network attacker can cause a broker DoS by sending a crafted WireFormatInfo frame with a malicious large size value. The value is not validate and causes the broker to attempt allocation during pre-auth negotiation which can trigger OOM and crash the broker.\nThis issue affects Apache ActiveMQ Client: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7.\n\nUsers are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue."}], "metrics": [{"other": {"content": {"text": "important"}, "type": "Textual description of severity"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-789", "description": "CWE-789 Memory Allocation with Excessive Size Value", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-06-30T09:53:03.435Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://lists.apache.org/thread/nxso951fnvf72qf9m475mpz4yf931xk0"}], "source": {"discovery": "UNKNOWN"}, "title": "Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All: Pre-authentication OpenWire memory-allocation DoS during wire format negotiation", "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/06/29/10"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-06-30T11:06:17.570Z"}}]}}

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