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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-116593
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-28 17:18:00 UTC
Updated2026-10-28 20:17:21 UTC
DescriptionApache 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Apache Software Foundation Apache Kafka affected 2.4.0 4.2.2 semver Not specified
CNA Apache Software Foundation Apache Kafka affected 4.3.0 4.3.2 semver Not specified

References

ReferenceSourceLinkTags
kafka.apache.org/cve-list [email protected] kafka.apache.org
www.openwall.com/lists/oss-security/2026/10/28/16 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Hyunwoo Kim <[email protected]> (en)

CNA: Sudhanshu Chauhan <[email protected]>, RedHunt Labs (en)

CNA: Bartłomiej Dmitruk <[email protected]>, Striga (en)

CNA: Andrew MacPherson <[email protected]> (en)

CNA: Mickael Maison <[email protected]> (en)

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