Description

Information exposure vulnerability has been identified in Apache Kafka. The NetworkClient component will output entire requests and responses information in the DEBUG log level in the logs. By default, the log level is set to INFO level. If the DEBUG level is enabled, the sensitive information will be exposed via the requests and responses output log. The entire lists of impacted requests and responses are: * AlterConfigsRequest * AlterUserScramCredentialsRequest * ExpireDelegationTokenRequest * IncrementalAlterConfigsRequest * RenewDelegationTokenRequest * SaslAuthenticateRequest * createDelegationTokenResponse * describeDelegationTokenResponse * SaslAuthenticateResponse This issue affects Apache Kafka: from any version supported the listed API above through v3.9.1, v4.0.0. We advise the Kafka users to upgrade to v3.9.2, v4.0.1, or later to avoid this vulnerability.

Weaknesses 1

Affected Products 5

References 3

• openwall.com http://www.openwall.com/lists/oss-security/2026/04/17/3
  Mailing List
• kafka.apache.org https://kafka.apache.org/cve-list
  Vendor Advisory
• lists.apache.org https://lists.apache.org/thread/pz5g4ky3h0k91tfd14p0dzqjp80960kl
  MitigationVendor Advisory

Remediation