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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-33558 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
http://www.openwall.com/lists/oss-security/2026/04/17/3 CVE
https://kafka.apache.org/cve-list Apache Software Foundation
https://lists.apache.org/thread/pz5g4ky3h0k91tfd14p0dzqjp80960kl Apache Software Foundation

Weakness Enumeration

CWE-ID CWE Name Source
CWE-533 DEPRECATED: Information Exposure Through Server Log Files Apache Software Foundation  

Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-33558
NVD Published Date:
04/20/2026
NVD Last Modified:
04/20/2026
Source:
Apache Software Foundation