CVE-2026-33227
Full vulnerability record from the local CVENow database.
Description
Improper validation and restriction of a classpath path name vulnerability in Apache ActiveMQ Client, Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ Web, Apache ActiveMQ. In two instances (when creating a Stomp consumer and also browsing messages in the Web console) an authenticated user provided "key" value could be constructed to traverse the classpath due to path concatenation. As a result, the application is exposed to a classpath path resource loading vulnerability that could potentially be chained together with another attack to lead to exploit. This issue affects Apache ActiveMQ Client: before 5.19.3, from 6.0.0 before 6.2.2; Apache ActiveMQ Broker: before 5.19.3, from 6.0.0 before 6.2.2; Apache ActiveMQ All: before 5.19.3, from 6.0.0 before 6.2.2; Apache ActiveMQ Web: before 5.19.3, from 6.0.0 before 6.2.2; Apache ActiveMQ: before 5.19.3, from 6.0.0 before 6.2.2. Users are recommended to upgrade to version 5.19.4 or 6.2.3, which fixes the issue. Note: 5.19.3 and 6.2.2 also fix this issue, but that is limited to non-Windows environments due to a path separator resolution bug fixed in 5.19.4 and 6.2.3.
Severity
MEDIUM
CVSS score
4.3
(v3.1)
Vulnerability status
Analyzed
Source identifier
Published
2026-04-07 09:16:20.750000
Last modified
2026-10-26 22:10:00.163000
View original CVE JSON
{
"id": "CVE-2026-33227",
"sourceIdentifier": "[email protected]",
"published": "2026-04-07T09:16:20.750",
"lastModified": "2026-10-26T22:10:00.163",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Improper validation and restriction of a classpath path name vulnerability in \n\n Apache ActiveMQ Client, Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ Web, Apache ActiveMQ.\n\n\n\nIn two instances (when creating a Stomp consumer and also browsing messages in the Web console) an authenticated user provided \"key\" value could be constructed to traverse the classpath due to path concatenation. As a result, the application is exposed to a classpath path resource loading vulnerability that could potentially be chained together with another attack to lead to exploit.\n\n\n\n\n\nThis issue affects Apache ActiveMQ Client: before 5.19.3, from 6.0.0 before 6.2.2; Apache ActiveMQ Broker: before 5.19.3, from 6.0.0 before 6.2.2; Apache ActiveMQ All: before 5.19.3, from 6.0.0 before 6.2.2; Apache ActiveMQ Web: before 5.19.3, from 6.0.0 before 6.2.2; Apache ActiveMQ: before 5.19.3, from 6.0.0 before 6.2.2.\n\nUsers are recommended to upgrade to version 5.19.4 or 6.2.3, which fixes the issue. Note: 5.19.3 and 6.2.2 also fix this issue, but that is limited to non-Windows environments due to a path separator resolution bug fixed in 5.19.4 and 6.2.3."
},
{
"lang": "es",
"value": "Validación y restricción inadecuadas de una vulnerabilidad de nombre de ruta de classpath en Apache ActiveMQ Cliente, Apache ActiveMQ Broker, Apache ActiveMQ All.\n\nEn dos instancias (al crear un consumidor Stomp y también al navegar por mensajes en la consola web), un valor de ’key’ proporcionado por un usuario autenticado podría construirse para recorrer el classpath debido a la concatenación de rutas. Como resultado, la aplicación está expuesta a una vulnerabilidad de carga de recursos de ruta de classpath que podría encadenarse con otro ataque para conducir a un exploit. Este problema afecta a Apache ActiveMQ Cliente: anterior a 5.19.3, desde 6.0.0 anterior a 6.2.2; Apache ActiveMQ Broker: anterior a 5.19.3, desde 6.0.0 anterior a 6.2.2; Apache ActiveMQ All: anterior a 5.19.3, desde 6.0.0 anterior a 6.2.2.\n\nSe recomienda a los usuarios actualizar a la versión 5.19.4 o 6.2.3, que corrige el problema. Nota: 5.19.3 y 6.2.2 también corrigen este problema, pero eso está limitado a entornos que no son Windows debido a un error de resolución de separador de ruta corregido en 5.19.4 y 6.2.3."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Apache Software Foundation",
"product": "Apache ActiveMQ Client",
"defaultStatus": "unaffected",
"collectionURL": "https://repo.maven.apache.org/maven2",
"packageName": "org.apache.activemq:activemq-client",
"versions": [
{
"version": "0",
"lessThan": "5.19.3",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.0.0",
"lessThan": "6.2.2",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "Apache Software Foundation",
"product": "Apache ActiveMQ Broker",
"defaultStatus": "unaffected",
"collectionURL": "https://repo.maven.apache.org/maven2",
"packageName": "org.apache.activemq:activemq-broker",
"versions": [
{
"version": "0",
"lessThan": "5.19.3",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.0.0",
"lessThan": "6.2.2",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "Apache Software Foundation",
"product": "Apache ActiveMQ All",
"defaultStatus": "unaffected",
"collectionURL": "https://repo.maven.apache.org/maven2",
"packageName": "org.apache.activemq:activemq-all",
"versions": [
{
"version": "0",
"lessThan": "5.19.3",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.0.0",
"lessThan": "6.2.2",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "Apache Software Foundation",
"product": "Apache ActiveMQ Web",
"defaultStatus": "unaffected",
"collectionURL": "https://repo.maven.apache.org/maven2",
"packageName": "org.apache.activemq:activemq-web",
"versions": [
{
"version": "0",
"lessThan": "5.19.3",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.0.0",
"lessThan": "6.2.2",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "Apache Software Foundation",
"product": "Apache ActiveMQ",
"defaultStatus": "unaffected",
"collectionURL": "https://repo.maven.apache.org/maven2",
"packageName": "org.apache.activemq:apache-activemq",
"versions": [
{
"version": "0",
"lessThan": "5.19.3",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.0.0",
"lessThan": "6.2.2",
"versionType": "semver",
"status": "affected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"availabilityImpact": "NONE"
},
"exploitabilityScore": 2.8,
"impactScore": 1.4
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-04-07T14:04:21.706397Z",
"id": "CVE-2026-33227",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-22"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.19.3",
"matchCriteriaId": "7442A37C-AACC-4BF1-8AB7-1B4FBDE44CB4"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.0.0",
"versionEndExcluding": "6.2.2",
"matchCriteriaId": "313BB84A-138D-43C8-B265-F789A4BED361"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:apache:activemq_broker:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.19.3",
"matchCriteriaId": "B4342B2A-3F2C-4016-87FB-66D69685FEA0"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:apache:activemq_broker:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.0.0",
"versionEndExcluding": "6.2.2",
"matchCriteriaId": "97120890-1D2D-4021-BF6D-362CEB57E13B"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:apache:activemq_web:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.19.3",
"matchCriteriaId": "0489A0FD-BF30-47A7-8AB7-19260119ABF1"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:apache:activemq_web:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.0.0",
"versionEndExcluding": "6.2.2",
"matchCriteriaId": "EF252D19-2B2F-41ED-A2D6-1C4AC2CDCF37"
}
]
}
]
}
],
"references": [
{
"url": "https://activemq.apache.org/security-advisories.data/CVE-2026-33227-announcement.txt",
"source": "[email protected]",
"tags": [
"Vendor Advisory"
]
},
{
"url": "http://www.openwall.com/lists/oss-security/2026/04/06/4",
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
]
}
]
}