{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42253", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-04-25T19:48:04.140Z", "datePublished": "2026-06-01T07:23:50.962Z", "dateUpdated": "2026-06-01T07:47:36.520Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://repo.maven.apache.org/maven2", "defaultStatus": "unaffected", "packageName": "org.apache.activemq:apache-activemq", "product": "Apache ActiveMQ", "vendor": "Apache Software Foundation", "versions": [{"lessThan": "5.19.7", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThan": "6.2.6", "status": "affected", "version": "6.0.0", "versionType": "semver"}]}, {"collectionURL": "https://repo.maven.apache.org/maven2", "defaultStatus": "unaffected", "packageName": "org.apache.activemq:activemq-web", "product": "Apache ActiveMQ Web", "vendor": "Apache Software Foundation", "versions": [{"lessThan": "5.19.7", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThan": "6.2.6", "status": "affected", "version": "6.0.0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Vishal Shukla"}, {"lang": "en", "type": "finder", "value": "pyn3rd"}, {"lang": "en", "type": "finder", "value": "uname"}, {"lang": "en", "type": "finder", "value": "4ra1n"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Apache ActiveMQ, Apache ActiveMQ Web.</p><span style=\"background-color: rgb(255, 255, 255);\">The MessageServlet in the ActiveMQ web console API copies every JMS message\nproperty into an HTTP response header without any validation. This can allow overwriting and injecting security headers by setting them on JMS messages that are returned by the servlet.<br></span><br><p>This issue affects Apache ActiveMQ: before 5.19.7, from 6.0.0 before 6.2.6; Apache ActiveMQ Web: before 5.19.7, from 6.0.0 before 6.2.6.</p><p>Users are recommended to upgrade to version 5.19.7 or 6.2.6, which fixes the issue.&nbsp;<span style=\"background-color: rgb(255, 255, 255);\">The MessageServlet has now been deprecated and disabled by default.</span></p>"}], "value": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Apache ActiveMQ, Apache ActiveMQ Web.\n\nThe MessageServlet in the ActiveMQ web console API copies every JMS message\nproperty into an HTTP response header without any validation. This can allow overwriting and injecting security headers by setting them on JMS messages that are returned by the servlet.\n\nThis issue affects Apache ActiveMQ: before 5.19.7, from 6.0.0 before 6.2.6; Apache ActiveMQ Web: before 5.19.7, from 6.0.0 before 6.2.6.\n\nUsers are recommended to upgrade to version 5.19.7 or 6.2.6, which fixes the issue.\u00a0The MessageServlet has now been deprecated and disabled by default."}], "metrics": [{"other": {"content": {"text": "important"}, "type": "Textual description of severity"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-06-01T07:23:50.962Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://lists.apache.org/thread/j9vmlc410ht5f28fc98gx75jcbq62j00"}], "source": {"discovery": "UNKNOWN"}, "title": "Apache ActiveMQ, Apache ActiveMQ Web: HTTP Response Header Injection via JMS Message Properties", "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/05/31/17"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-06-01T07:47:36.520Z"}}]}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Apache ActiveMQ, Apache ActiveMQ Web.\n\nThe MessageServlet in the ActiveMQ web console API copies every JMS message\nproperty into an HTTP response header without any validation. This can allow overwriting and injecting security headers by setting them on JMS messages that are returned by the servlet.\n\nThis issue affects Apache ActiveMQ: before 5.19.7, from 6.0.0 before 6.2.6; Apache ActiveMQ Web: before 5.19.7, from 6.0.0 before 6.2.6.\n\nUsers are recommended to upgrade to version 5.19.7 or 6.2.6, which fixes the issue.\u00a0The MessageServlet has now been deprecated and disabled by default."}], "id": "CVE-2026-42253", "lastModified": "2026-06-01T09:16:18.673", "metrics": {}, "published": "2026-06-01T09:16:18.673", "references": [{"source": "security@apache.org", "url": "https://lists.apache.org/thread/j9vmlc410ht5f28fc98gx75jcbq62j00"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/05/31/17"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security@apache.org", "type": "Primary"}]}

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