Description
Apache Kafka Connect has the /connector-plugins/{connector-type}/config/validate endpoint on its REST API to validate connector configurations.
Apache Kafka Connect also support Configuration Providers which enable to hide the values of sensitive configuration and only resolve them at runtime.
An attacker with access to the validate endpoint can use it to resolve and return plaintext values via any of the configuration providers installed on a Connect worker.
Users are recommended to upgrade to version 4.2.2, 4.3.2, 4.4.0 or above, which fix this issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache Kafka | 2.4.0 – < 4.2.2, 4.3.0 – < 4.3.2 | 4.2.2 |
Advisories 1
- WID-SEC-2026-4221 Apache Kafka: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 28, 2026
References
- https://kafka.apache.org/cve-list vendor-advisory
- https://lists.apache.org/thread/ylblfrfk1bspy9zh2j6dz8o2pkn6s9g0 mailing-list