Apache Kafka bypass allows unauthorized confidential data access
Apache Kafka versions 4.x before 4.3.0 contain a vulnerability allowing attackers to bypass security policies and access confidential data.
Sourcecert.ssi.gouv.fr — open the original
What to check
- Applies to
- The 1 CVE named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- No exploitation in the wild and no public exploit is recorded for the CVEs named.
The French CERT has published an advisory regarding a security vulnerability in Apache Kafka. The flaw affects all 4.x versions prior to 4.3.0 and enables attackers to circumvent security policies and compromise data confidentiality.
The vulnerability is tracked as CVE-2026-41115 and was disclosed on June 2, 2026. Apache has released version 4.3.0 to address this issue. Organizations running affected versions should consult the official Apache Kafka security bulletin for patching guidance.
Given Kafka's widespread use as a distributed streaming platform in enterprise environments, this vulnerability poses significant risk to organizations that rely on it for handling sensitive data streams and event processing.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0678
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