Security Vulnerabilities
Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, when a configured authenticator or authorizator class cannot be loaded, Server.initializeAuthenticator and Server.initializeAuthorizatorPolicy treat the failure as though no custom class was configured and fall back to AcceptAllAuthenticator or PermitAllAuthorizatorPolicy. A misspelled class name, missing dependency, constructor failure, or classpath problem can therefore start the broker with authentication or authorization disabled even though the operator configured those controls. This issue is fixed in version 0.18.1.
CVSS Score
9.3
EPSS Score
0.005
Published
2026-09-23
Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, Moquette does not limit the depth of topic names and topic filters before processing them through recursive CTrie insertion and matching operations. A remote client can publish or subscribe with a deeply nested topic, causing a StackOverflowError that disrupts session processing and can deny service to broker clients. This issue is fixed in version 0.18.1.
CVSS Score
8.7
EPSS Score
0.004
Published
2026-09-23
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.
CVSS Score
8.7
EPSS Score
0.004
Published
2026-09-23
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.
CVSS Score
9.6
EPSS Score
0.003
Published
2026-09-23
IBM Concert 1.0.0 through 3.0.0 could allow a remote attacker to obtain sensitive information when a detailed technical error message is returned in the browser. This information could be used in further attacks against the system.
CVSS Score
5.3
EPSS Score
0.002
Published
2026-09-23
IBM Concert 1.0.0 through 3.0.0 could allow an unauthorized user to inject data into log messages due to improper neutralization of special elements when written to log files.
CVSS Score
4.3
EPSS Score
0.002
Published
2026-09-23
Dell Secure Connect Gateway (SCG) Policy Manager, versions prior to 5.34.00.16, contains an Inclusion of Sensitive Information in Source Code vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to Information exposure.
CVSS Score
7.5
EPSS Score
0.003
Published
2026-09-23
Dell Secure Connect Gateway (SCG) Policy Manager, versions prior to 5.34.00.16, contains an Insufficient Session Expiration vulnerability. A low privileged attacker with adjacent network access could potentially exploit this vulnerability, leading to Elevation of privileges, Protection mechanism bypass, and Unauthorized access.
CVSS Score
6.4
EPSS Score
0.001
Published
2026-09-23
Dell Secure Connect Gateway (SCG) Policy Manager, versions prior to 5.34.00.16, contains an Improper Certificate Validation vulnerability. An unauthenticated attacker with adjacent network access could potentially exploit this vulnerability, leading to Information disclosure, Information tampering, and Protection mechanism bypass.
CVSS Score
6.8
EPSS Score
0.001
Published
2026-09-23
Dell Secure Connect Gateway (SCG) Policy Manager, versions prior to 5.34.00.16, contains a Missing Authentication for Critical Function vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to Unauthorized access.
CVSS Score
7.4
EPSS Score
0.002
Published
2026-09-23