What it is
Message brokers such as RabbitMQ or Kafka.
Why it is risky
If exposed, messages can be intercepted or injected — tampering with business flows or leaking credentials.
What to do
Apply TLS·SASL authentication and limit broker ports to the application network.
Is it listening on your server?
Linux
ss -ltnp 'sport = :9092'Known vulnerabilities in Kafka
| CVE | Title | CVSS | Exploited | EPSS | Published |
|---|---|---|---|---|---|
| CVE-2026-33557 | Apache Kafka: Missing JWT token validation in OAUTHBEARER authentication | 9.1 | — | 2026-04-20 | |
| CVE-2018-17196 | In Apache Kafka versions between 0.11.0.0 and 2.1.0, it is possible to manually craft a Produce request which... | 8.8 | — | 2019-07-12 | |
| CVE-2025-27818 | Apache Kafka: Possible RCE attack via SASL JAAS LdapLoginModule configuration | 8.8 | — | 2025-06-10 | |
| CVE-2026-35554 | Apache Kafka Clients: Kafka Producer Message Corruption and Misrouting via Buffer Pool Race Condition | 8.7 | — | 2026-04-07 | |
| 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 |
Track these versions on your own servers
InfraGuard collects installed software versions from every server and flags the ones with known vulnerabilities. Self-hosted — nothing leaves your network.