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Kafka 2.3 vulnerabilities

7 known CVEs affect the 2.3 line of Kafka.

8.8 max CVSS
Check your versionkafka-topics.sh --version

CVEs affecting 2.3

CVE Title CVSS Exploited EPSS Published
CVE-2025-27818 Apache Kafka: Possible RCE attack via SASL JAAS LdapLoginModule configuration 8.8 — 2025-06-10
CVE-2019-12399 When Connect workers in Apache Kafka 2.0.0, 2.0.1, 2.1.0, 2.1.1, 2.2.0, 2.2.1, or 2.3.0 are configured with on... 7.5 — 2020-01-14
CVE-2025-27819 Apache Kafka: Possible RCE/Denial of service attack via SASL JAAS JndiLoginModule configuration 7.5 — 2025-06-10
CVE-2024-31141 Apache Kafka Clients: Privilege escalation to filesystem read-access via automatic ConfigProvider 6.5 — 2024-11-19
CVE-2021-38153 Timing Attack Vulnerability for Apache Kafka Connect and Clients 5.9 — 2021-09-22
CVE-2024-56128 Apache Kafka: SCRAM authentication vulnerable to replay attacks when used without encryption 5.3 — 2024-12-18
CVE-2026-33558 Apache Kafka, Apache Kafka Clients: Information Exposure Through Network Client Log Output 5.3 — 2026-04-20

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Data: CVE List (CVE® Program), NVD, CISA KEV, FIRST EPSS (see EPSS at https://www.first.org/epss), endoflife.date. Software list: awesome-selfhosted (CC BY-SA 3.0).