CVE-2026-116593

Apache Kafka: Kafka Connect configuration provider values exposed via validation REST API endpoint

State: Published
Severity: Not scored
Published: Oct 28, 2026
Updated: Oct 30, 2026
Reserved: Oct 26, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
Apache KafkaApache Software Foundation	2.4.0 to before 4.2.2Affected 4.3.0 to before 4.3.2Affected

References

https://kafka.apache.org/cve-listvendor-advisory
https://lists.apache.org/thread/ylblfrfk1bspy9zh2j6dz8o2pkn6s9g0mailing-list
http://www.openwall.com/lists/oss-security/2026/10/28/16

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