Unscored severity · published Oct 28, 2026
CVE-2026-116593
Apache Kafka: Kafka Connect configuration provider values exposed via validation REST API endpoint
New
–
CVSS
–
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AK
Apache Kafka · Apache Software Foundation
2.4.0 before 4.2.2; 4.3.0 before 4.3.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116593
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116593
kafka.apache.org
https://kafka.apache.org/cve-list
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