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    10 vulnerabilities by moquette

    CVE-2026-95846 (GCVE-0-2026-95846)

    Vulnerability from nvd – Published: 2026-09-23 16:29 – Updated: 2026-09-24 14:21
    VLAI
    Title
    Moquette publishes Last-Will messages without enforcing write authorization
    Summary
    Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.publishWill publishes a client's Last-Will message without applying the canWrite authorization and reserved-topic checks used for a normal PUBLISH. A client can configure a Will for a topic that the client is not permitted to write and cause the broker to publish the unauthorized message when the client disconnects unexpectedly. This issue allows unauthorized message injection into restricted topics. This issue is fixed in version 0.18.1.
    Severity
    8.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-24 14:21 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    moquette-io moquette Affected: < 0.18.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-95845 (GCVE-0-2026-95845)

    Vulnerability from nvd – Published: 2026-09-23 16:29 – Updated: 2026-09-23 19:44
    VLAI
    Title
    Moquette unbounded per-session message queues allow memory exhaustion
    Summary
    Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, the broker does not enforce a maximum length for pending per-session message queues. When a fast publisher sends messages to a slow subscriber whose in-flight window is full, queued messages can accumulate without bound in memory or persistent storage. Remote clients can use this condition to exhaust broker resources and cause a denial of service. This issue is fixed in version 0.18.1.
    Severity
    8.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-23 18:06 UTC
    CWE
    • CWE-770 - Allocation of Resources Without Limits or Throttling
    Assigner
    References
    Impacted products
    Vendor Product Version
    moquette-io moquette Affected: < 0.18.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-95843 (GCVE-0-2026-95843)

    Vulnerability from nvd – Published: 2026-09-23 16:29 – Updated: 2026-09-23 17:58
    VLAI
    Title
    Moquette malformed shared subscriptions can crash command processing
    Summary
    Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.subscribe parses a shared-subscription filter through SharedSubscriptionUtils.extractShareName before validating the complete $share/{shareName}/{topicFilter} structure. A remote client can send a filter such as $share/grp without a topic-filter portion, causing a StringIndexOutOfBoundsException while calculating the share name. The exception terminates command handling on the shared session event loop and can deny service to other client sessions assigned to that loop. This issue is fixed in version 0.18.1.
    Severity
    8.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-23 17:57 UTC
    CWE
    • CWE-20 - Improper Input Validation
    Assigner
    References
    Impacted products
    Vendor Product Version
    moquette-io moquette Affected: < 0.18.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-95842 (GCVE-0-2026-95842)

    Vulnerability from nvd – Published: 2026-09-23 16:29 – Updated: 2026-09-23 16:49
    VLAI
    Title
    Moquette uncaught MQTT command exceptions can terminate shared session event loops
    Summary
    Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, SessionEventLoop.run catches only InterruptedException, and SessionEventLoopGroup does not restart a terminated loop. An MQTT command that raises an uncaught exception can terminate an event loop shared by multiple client sessions, preventing every co-located client from processing PUBLISH, SUBSCRIBE, PUBACK, and other commands. An attacker can select client IDs that map across the available loops to disrupt session processing for the entire broker. This issue is fixed in version 0.18.1.
    Severity
    8.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-23 16:48 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    moquette-io moquette Affected: < 0.18.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-85724 (GCVE-0-2026-85724)

    Vulnerability from nvd – Published: 2026-09-23 16:29 – Updated: 2026-09-24 14:19
    VLAI
    Title
    Moquette pattern ACL wildcard injection allows cross-tenant authorization bypass
    Summary
    Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, when pattern-based ACL rules are configured, AuthorizationsCollector.canDoOperation substitutes client ID and username values directly into rules containing %c or %u and then treats the result as an MQTT topic filter. A client that uses + or # in either identity can broaden the substituted filter and gain cross-tenant read and write access. A # identity can also produce an invalid filter that triggers a NullPointerException in Topic.match and disrupts session processing. This issue is fixed in version 0.18.1.
    Severity
    9.6 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
    SSVC
    Exploitation: poc Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-24 14:18 UTC
    CWE
    • CWE-863 - Incorrect Authorization
    • CWE-155 - Improper Neutralization of Wildcards or Matching Symbols
    Assigner
    References
    Impacted products
    Vendor Product Version
    moquette-io moquette Affected: < 0.18.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-95846 (GCVE-0-2026-95846)

    Vulnerability from cvelistv5 – Published: 2026-09-23 16:29 – Updated: 2026-09-24 14:21
    VLAI
    Title
    Moquette publishes Last-Will messages without enforcing write authorization
    Summary
    Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.publishWill publishes a client's Last-Will message without applying the canWrite authorization and reserved-topic checks used for a normal PUBLISH. A client can configure a Will for a topic that the client is not permitted to write and cause the broker to publish the unauthorized message when the client disconnects unexpectedly. This issue allows unauthorized message injection into restricted topics. This issue is fixed in version 0.18.1.
    Severity
    8.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-24 14:21 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    moquette-io moquette Affected: < 0.18.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-95845 (GCVE-0-2026-95845)

    Vulnerability from cvelistv5 – Published: 2026-09-23 16:29 – Updated: 2026-09-23 19:44
    VLAI
    Title
    Moquette unbounded per-session message queues allow memory exhaustion
    Summary
    Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, the broker does not enforce a maximum length for pending per-session message queues. When a fast publisher sends messages to a slow subscriber whose in-flight window is full, queued messages can accumulate without bound in memory or persistent storage. Remote clients can use this condition to exhaust broker resources and cause a denial of service. This issue is fixed in version 0.18.1.
    Severity
    8.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-23 18:06 UTC
    CWE
    • CWE-770 - Allocation of Resources Without Limits or Throttling
    Assigner
    References
    Impacted products
    Vendor Product Version
    moquette-io moquette Affected: < 0.18.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-95843 (GCVE-0-2026-95843)

    Vulnerability from cvelistv5 – Published: 2026-09-23 16:29 – Updated: 2026-09-23 17:58
    VLAI
    Title
    Moquette malformed shared subscriptions can crash command processing
    Summary
    Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.subscribe parses a shared-subscription filter through SharedSubscriptionUtils.extractShareName before validating the complete $share/{shareName}/{topicFilter} structure. A remote client can send a filter such as $share/grp without a topic-filter portion, causing a StringIndexOutOfBoundsException while calculating the share name. The exception terminates command handling on the shared session event loop and can deny service to other client sessions assigned to that loop. This issue is fixed in version 0.18.1.
    Severity
    8.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-23 17:57 UTC
    CWE
    • CWE-20 - Improper Input Validation
    Assigner
    References
    Impacted products
    Vendor Product Version
    moquette-io moquette Affected: < 0.18.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-95842 (GCVE-0-2026-95842)

    Vulnerability from cvelistv5 – Published: 2026-09-23 16:29 – Updated: 2026-09-23 16:49
    VLAI
    Title
    Moquette uncaught MQTT command exceptions can terminate shared session event loops
    Summary
    Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, SessionEventLoop.run catches only InterruptedException, and SessionEventLoopGroup does not restart a terminated loop. An MQTT command that raises an uncaught exception can terminate an event loop shared by multiple client sessions, preventing every co-located client from processing PUBLISH, SUBSCRIBE, PUBACK, and other commands. An attacker can select client IDs that map across the available loops to disrupt session processing for the entire broker. This issue is fixed in version 0.18.1.
    Severity
    8.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-23 16:48 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    moquette-io moquette Affected: < 0.18.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-85724 (GCVE-0-2026-85724)

    Vulnerability from cvelistv5 – Published: 2026-09-23 16:29 – Updated: 2026-09-24 14:19
    VLAI
    Title
    Moquette pattern ACL wildcard injection allows cross-tenant authorization bypass
    Summary
    Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, when pattern-based ACL rules are configured, AuthorizationsCollector.canDoOperation substitutes client ID and username values directly into rules containing %c or %u and then treats the result as an MQTT topic filter. A client that uses + or # in either identity can broaden the substituted filter and gain cross-tenant read and write access. A # identity can also produce an invalid filter that triggers a NullPointerException in Topic.match and disrupts session processing. This issue is fixed in version 0.18.1.
    Severity
    9.6 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
    SSVC
    Exploitation: poc Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-24 14:18 UTC
    CWE
    • CWE-863 - Incorrect Authorization
    • CWE-155 - Improper Neutralization of Wildcards or Matching Symbols
    Assigner
    References
    Impacted products
    Vendor Product Version
    moquette-io moquette Affected: < 0.18.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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