CVE-2026-33227 (GCVE-0-2026-33227)

Vulnerability from cvelistv5 – Published: 2026-04-07 07:50 – Updated: 2026-04-08 15:44
VLAI
Title
Apache ActiveMQ Client, Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ Web, Apache ActiveMQ: Improper Limitation of a Pathname to a Restricted Classpath Directory
Summary
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
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-07 14:04 UTC
CWE
  • CWE-22 - Improper input validation for resource loading
Assigner
apache CNA under the mitre root
CNA scorecard B 76/100 over 1085 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Apache Software Foundation Apache ActiveMQ Client Affected: 0 , < 5.19.3 (semver)
Affected: 6.0.0 , < 6.2.2 (semver)
guessed Create a notification for this product.
Apache Software Foundation Apache ActiveMQ Broker Affected: 0 , < 5.19.3 (semver)
Affected: 6.0.0 , < 6.2.2 (semver)
guessed Create a notification for this product.
Apache Software Foundation Apache ActiveMQ All Affected: 0 , < 5.19.3 (semver)
Affected: 6.0.0 , < 6.2.2 (semver)
guessed Create a notification for this product.
Apache Software Foundation Apache ActiveMQ Web Affected: 0 , < 5.19.3 (semver)
Affected: 6.0.0 , < 6.2.2 (semver)
guessed Create a notification for this product.
Apache Software Foundation Apache ActiveMQ Affected: 0 , < 5.19.3 (semver)
Affected: 6.0.0 , < 6.2.2 (semver)
guessed Create a notification for this product.
Credits
Dawei Wang
Show details on NVD website
To clipboard 

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                  "baseSeverity": "MEDIUM",
                  "confidentialityImpact": "LOW",
                  "integrityImpact": "NONE",
                  "privilegesRequired": "LOW",
                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
                  "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
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                    "id": "CVE-2026-33227",
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                    "role": "CISA Coordinator",
                    "timestamp": "2026-04-07T14:04:21.706397Z",
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              "dateUpdated": "2026-04-07T14:03:27.404Z",
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              "shortName": "CISA-ADP"
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            "title": "CISA ADP Vulnrichment"
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              "collectionURL": "https://repo.maven.apache.org/maven2",
              "defaultStatus": "unaffected",
              "packageName": "org.apache.activemq:activemq-client",
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              "defaultStatus": "unaffected",
              "packageName": "org.apache.activemq:activemq-broker",
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              "vendor": "Apache Software Foundation",
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              ]
            },
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              "collectionURL": "https://repo.maven.apache.org/maven2",
              "defaultStatus": "unaffected",
              "packageName": "org.apache.activemq:activemq-all",
              "product": "Apache ActiveMQ All",
              "vendor": "Apache Software Foundation",
              "versions": [
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                  "status": "affected",
                  "version": "0",
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                {
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              ]
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              "collectionURL": "https://repo.maven.apache.org/maven2",
              "defaultStatus": "unaffected",
              "packageName": "org.apache.activemq:activemq-web",
              "product": "Apache ActiveMQ Web",
              "vendor": "Apache Software Foundation",
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                  "status": "affected",
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              "type": "finder",
              "value": "Dawei Wang"
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                  "value": "\u003cp\u003eImproper 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\u003cbr\u003e\u003cbr\u003eIn 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.\u003c/p\u003e\u003cp\u003e\n\n\u003c/p\u003e\u003cp\u003eThis 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.\u003c/p\u003eUsers 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.\u003cbr\u003e\u003cp\u003e\u003c/p\u003e"
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                "content": {
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          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-22",
                  "description": "CWE-22 Improper input validation for resource loading",
                  "lang": "en",
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          "providerMetadata": {
            "dateUpdated": "2026-04-08T15:44:39.427Z",
            "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
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              "url": "https://activemq.apache.org/security-advisories.data/CVE-2026-33227-announcement.txt"
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          "source": {
            "discovery": "UNKNOWN"
          },
          "title": "Apache ActiveMQ Client, Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ Web, Apache ActiveMQ: Improper Limitation of a Pathname to a Restricted Classpath Directory",
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        "assignerShortName": "apache",
        "cveId": "CVE-2026-33227",
        "datePublished": "2026-04-07T07:50:58.897Z",
        "dateReserved": "2026-03-18T00:08:09.668Z",
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      },
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    }
  }
}



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