CVE-2025-27819

Description

In CVE-2023-25194, we announced the RCE/Denial of service attack via SASL JAAS JndiLoginModule configuration in Kafka Connect API. But not only Kafka Connect API is vulnerable to this attack, the Apache Kafka brokers also have this vulnerability. To exploit this vulnerability, the attacker needs to be able to connect to the Kafka cluster and have the AlterConfigs permission on the cluster resource. Since Apache Kafka 3.4.0, we have added a system property ("-Dorg.apache.kafka.disallowed.login.modules") to disable the problematic login modules usage in SASL JAAS configuration. Also by default "com.sun.security.auth.module.JndiLoginModule" is disabled in Apache Kafka 3.4.0, and "com.sun.security.auth.module.JndiLoginModule,com.sun.security.auth.module.LdapLoginModule" is disabled by default in in Apache Kafka 3.9.1/4.0.0

How to fix CVE-2025-27819

To remediate CVE-2025-27819, upgrade the affected package to a fixed version below.

• —upgrade to 3.4.1 or later
• —no fix listed
• —no fix listed
• —upgrade to 3.4.0 or later
• —upgrade to 3.4.0 or later
• —no fix listed
• —no fix listed
• —no fix listed
• —no fix listed

Is CVE-2025-27819 being exploited?

Low — EPSS is 0.9%, meaning exploitation activity has not been observed at scale.

Affected packages (9)

• >= 2.0.0, < 3.4.1
• from 0
• from 0
• from 0, < 3.4.0
• from 0, < 3.4.0
• from 0
• from 0
• from 0
• from 0

CVSS scores

References (4)

• ADVISORYgithub.com/advisories/GHSA-26f8-x7cc-wqpc
• ADVISORYnvd.nist.gov/vuln/detail/CVE-2025-27819
• PATCHgithub.com/apache/kafka
• WEBkafka.apache.org/cve-list