{"id":"CVE-2026-50734","state":"PUBLISHED","title":"Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All: Pre-authentication OpenWire memory-allocation DoS during wire format negotiation","description":"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.","publishedAt":"2026-06-30T09:53:03.435Z","updatedAt":"2026-06-30T12:32:25.918Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"apache","products":["Apache Software Foundation Apache ActiveMQ Client","Apache Software Foundation Apache ActiveMQ","Apache Software Foundation Apache ActiveMQ All"],"affected":[{"vendor":"Apache Software Foundation","product":"Apache ActiveMQ Client","packageName":"org.apache.activemq:activemq-client","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"5.19.8","versionType":"semver"},{"version":"6.0.0","status":"affected","lessThan":"6.2.7","versionType":"semver"}],"collectionURL":"https://repo.maven.apache.org/maven2"},{"vendor":"Apache Software Foundation","product":"Apache ActiveMQ","packageName":"org.apache.activemq:apache-activemq","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"5.19.8","versionType":"semver"},{"version":"6.0.0","status":"affected","lessThan":"6.2.7","versionType":"semver"}]},{"vendor":"Apache Software Foundation","product":"Apache ActiveMQ All","packageName":"org.apache.activemq:activemq-all","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"5.19.8","versionType":"semver"},{"version":"6.0.0","status":"affected","lessThan":"6.2.7","versionType":"semver"}]}],"references":["https://lists.apache.org/thread/nxso951fnvf72qf9m475mpz4yf931xk0","http://www.openwall.com/lists/oss-security/2026/06/29/10"],"weaknesses":["CWE-789"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/50xxx/CVE-2026-50734.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-50734","state":"PUBLISHED","datePublished":"2026-06-30T09:53:03.435Z","dateUpdated":"2026-06-30T12:32:25.918Z","assignerShortName":"apache","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateReserved":"2026-06-05T17:01:29.414Z"},"containers":{"cna":{"title":"Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All: Pre-authentication OpenWire memory-allocation DoS during wire format negotiation","descriptions":[{"lang":"en","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."}],"affected":[{"vendor":"Apache Software Foundation","product":"Apache ActiveMQ Client","packageName":"org.apache.activemq:activemq-client","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"5.19.8","versionType":"semver"},{"version":"6.0.0","status":"affected","lessThan":"6.2.7","versionType":"semver"}],"collectionURL":"https://repo.maven.apache.org/maven2"},{"vendor":"Apache Software Foundation","product":"Apache ActiveMQ","packageName":"org.apache.activemq:apache-activemq","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"5.19.8","versionType":"semver"},{"version":"6.0.0","status":"affected","lessThan":"6.2.7","versionType":"semver"}]},{"vendor":"Apache Software Foundation","product":"Apache ActiveMQ All","packageName":"org.apache.activemq:activemq-all","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"5.19.8","versionType":"semver"},{"version":"6.0.0","status":"affected","lessThan":"6.2.7","versionType":"semver"}]}],"references":[{"url":"https://lists.apache.org/thread/nxso951fnvf72qf9m475mpz4yf931xk0","tags":["vendor-advisory"]}],"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":{"shortName":"apache","orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateUpdated":"2026-06-30T09:53:03.435Z"},"credits":[{"lang":"en","type":"finder","value":"Andrej Tomci"}],"source":{"discovery":"UNKNOWN"},"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":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-06-30T11:06:17.570Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-06-30T12:32:21.060414Z","id":"CVE-2026-50734","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-30T12:32:25.918Z"}}]}}}