CVE-2026-108946

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This allows an authenticated client to spoof another user's ids. This allows:\n\n\n\n\n\n * \u00a0an authenticated client consumes from another connection's temporary queue/topic by putting the victim's connection id in its own ConsumerId, bypassing the broker-side ownership check.\u00a0\n * a duplicate ConsumerId registration is only logged, after which the attacker's RemoveInfo or disconnect tears down the victim's live subscription\n * a forged MessageAck for the victim's ConsumerId permanently deletes an in-flight, unacknowledged message.\n\n\n\n\n\n\n\n\nThis issue affects Apache ActiveMQ: from 6.0.0 before 6.3.3, before 5.19.12; Apache ActiveMQ KahaDB: from 6.0.0 before 6.3.3, before 5.19.12.\n\n\n\nUsers are recommended to upgrade to version 6.4.0, 6.3.3, or 5.19.12, which fixes the issue.", "lang": "en", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Improper input validation vulnerability in Apache ActiveMQ, Apache ActiveMQ KahaDB.</p><p>The ActiveMQ broker resolves connection, session and consumer state from ids that are user provided and in some scenarios does not validate that they ids are bound to that user. This allows an authenticated client to spoof another user's ids. This allows:</p><p></p><ul><li>&nbsp;an authenticated client consumes from another connection's temporary queue/topic by putting the victim's connection id in its own ConsumerId, bypassing the broker-side ownership check.&nbsp;</li><li>a duplicate ConsumerId registration is only logged, after which the attacker's RemoveInfo or disconnect tears down the victim's live subscription</li><li>a forged MessageAck for the victim's ConsumerId permanently deletes an in-flight, unacknowledged message.</li></ul><p></p><p><span>This issue affects Apache ActiveMQ: from 6.0.0 before 6.3.3, before 5.19.12; Apache ActiveMQ KahaDB: from 6.0.0 before 6.3.3, before 5.19.12.</span></p><p>Users are recommended to upgrade to version 6.4.0, 6.3.3, or 5.19.12, which fixes the issue.</p>"}]}], "references": [{"url": "https://lists.apache.org/thread/0spj0m846vhw3cjyfmzsy3l8vxh6f5t6", "tags": ["vendor-advisory"]}], "metrics": [{"other": {"type": "Textual description of severity", "content": {"text": "important"}}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "credits": [{"lang": "en", "value": "zerovuln labs <zerovulnlabs@outlook.com>", "type": "finder"}], "x_generator": {"engine": "Vulnogram 1.0.3"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/11/03/17"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-11-04T12:11:22.685Z"}}, {"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-11-10T12:29:57.094782Z", "id": "CVE-2026-108946", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-10T12:31:07.422Z"}}]}}

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This allows an authenticated client to spoof another user's ids. This allows:\n\n\n\n\n\n * \u00a0an authenticated client consumes from another connection's temporary queue/topic by putting the victim's connection id in its own ConsumerId, bypassing the broker-side ownership check.\u00a0\n * a duplicate ConsumerId registration is only logged, after which the attacker's RemoveInfo or disconnect tears down the victim's live subscription\n * a forged MessageAck for the victim's ConsumerId permanently deletes an in-flight, unacknowledged message.\n\n\n\n\n\n\n\n\nThis issue affects Apache ActiveMQ: from 6.0.0 before 6.3.3, before 5.19.12; Apache ActiveMQ KahaDB: from 6.0.0 before 6.3.3, before 5.19.12.\n\n\n\nUsers are recommended to upgrade to version 6.4.0, 6.3.3, or 5.19.12, which fixes the issue.", "lang": "en", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Improper input validation vulnerability in Apache ActiveMQ, Apache ActiveMQ KahaDB.</p><p>The ActiveMQ broker resolves connection, session and consumer state from ids that are user provided and in some scenarios does not validate that they ids are bound to that user. This allows an authenticated client to spoof another user's ids. This allows:</p><p></p><ul><li>&nbsp;an authenticated client consumes from another connection's temporary queue/topic by putting the victim's connection id in its own ConsumerId, bypassing the broker-side ownership check.&nbsp;</li><li>a duplicate ConsumerId registration is only logged, after which the attacker's RemoveInfo or disconnect tears down the victim's live subscription</li><li>a forged MessageAck for the victim's ConsumerId permanently deletes an in-flight, unacknowledged message.</li></ul><p></p><p><span>This issue affects Apache ActiveMQ: from 6.0.0 before 6.3.3, before 5.19.12; Apache ActiveMQ KahaDB: from 6.0.0 before 6.3.3, before 5.19.12.</span></p><p>Users are recommended to upgrade to version 6.4.0, 6.3.3, or 5.19.12, which fixes the issue.</p>"}]}], "references": [{"url": "https://lists.apache.org/thread/0spj0m846vhw3cjyfmzsy3l8vxh6f5t6", "tags": ["vendor-advisory"]}], "metrics": [{"other": {"type": "Textual description of severity", "content": {"text": "important"}}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "credits": [{"lang": "en", "value": "zerovuln labs <zerovulnlabs@outlook.com>", "type": "finder"}], "x_generator": {"engine": "Vulnogram 1.0.3"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/11/03/17"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-11-04T12:11:22.685Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-108946", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-10T12:29:57.094782Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-10T12:29:49.526Z"}}]}}

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{"bugzilla": {"description": "org.apache.activemq/activemq-broker: org.apache.activemq/activemq-kahadb-store: ActiveMQ: unauthorized message access via user identifier spoofing", "id": "2566825", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2566825"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L", "status": "draft"}, "cwe": "CWE-639", "details": ["Improper input validation vulnerability in Apache ActiveMQ, Apache ActiveMQ KahaDB.\nThe ActiveMQ broker resolves connection, session and consumer state from ids that are user provided and in some scenarios does not validate that they ids are bound to that user. This allows an authenticated client to spoof another user's ids. This allows:\n* \u00a0an authenticated client consumes from another connection's temporary queue/topic by putting the victim's connection id in its own ConsumerId, bypassing the broker-side ownership check.\u00a0\n* a duplicate ConsumerId registration is only logged, after which the attacker's RemoveInfo or disconnect tears down the victim's live subscription\n* a forged MessageAck for the victim's ConsumerId permanently deletes an in-flight, unacknowledged message.\nThis issue affects Apache ActiveMQ: from 6.0.0 before 6.3.3, before 5.19.12; Apache ActiveMQ KahaDB: from 6.0.0 before 6.3.3, before 5.19.12.\nUsers are recommended to upgrade to version 6.4.0, 6.3.3, or 5.19.12, which fixes the issue.", "A flaw was found in Apache ActiveMQ. The message broker fails to properly validate that user-provided connection, session, and consumer identifiers belong to the authenticated client submitting them. An authenticated remote attacker can exploit this issue by spoofing another user's identifiers to access messages from private queues, terminate legitimate subscriptions, or delete in-flight messages."], "name": "CVE-2026-108946", "package_state": [{"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Out of support scope", "package_name": "activemq-broker", "product_name": "Red Hat Fuse 7"}, {"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Out of support scope", "package_name": "activemq-kahadb-store", "product_name": "Red Hat Fuse 7"}], "public_date": "2026-11-04T10:14:06Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-108946\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-108946\nhttps://lists.apache.org/thread/0spj0m846vhw3cjyfmzsy3l8vxh6f5t6"], "threat_severity": "Moderate"}

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