Advisory [CVE-2026-116593] Apache Kafka Connect has the /connector-plugins/{connector-type}/config/validate endpoint on its REST API to validate connector configurations
This security Apache Software Foundation advisory covers CVE-2026-116593; related products: Apache Kafka Connect.
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Summary
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.
- Apache Kafka 2.4.0 before 4.2.2
- Apache Kafka 4.3.0 before 4.3.2
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
- 4.2.2
- 4.3.2
- 4.4.0
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- Apache Kafka Connect also support Configuration Providers which enable to hide the values of sensitive configuration and only resolve them at runtime.
- Users are recommended to upgrade to version 4.2.2, 4.3.2, 4.4.0 or above, which fix this issue.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
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