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
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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              "vendor": "Apache Software Foundation",
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              "product": "Apache ActiveMQ All",
              "vendor": "Apache Software Foundation",
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              "defaultStatus": "unaffected",
              "packageName": "org.apache.activemq:activemq-web",
              "product": "Apache ActiveMQ Web",
              "vendor": "Apache Software Foundation",
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                  "lessThan": "5.19.3",
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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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              "descriptions": [
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                  "cweId": "CWE-22",
                  "description": "CWE-22 Improper input validation for resource loading",
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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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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.