GHSA-wf66-mphr-4c4r
Apache Kafka exposes sensitive information in its DEBUG logs
At a glance
- Published
- Updated
- CVE
- CVE-2026-33558
- Aliases
- BIT-kafka-2026-33558
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
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. Apache advises Kafka users to upgrade to v3.9.2, v4.0.1, or later to avoid this vulnerability.
Affected packages
| Package | Versions |
|---|---|
| Maven · org.apache.kafka:kafka-clients | introduced 0.11.0, fixed 3.9.2 |
| Maven · org.apache.kafka:kafka-clients | introduced 4.0.0, fixed 4.0.1 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-33558 ADVISORY
- https://github.com/apache/kafka PACKAGE
- https://kafka.apache.org/cve-list WEB
- https://lists.apache.org/thread/pz5g4ky3h0k91tfd14p0dzqjp80960kl WEB
- http://www.openwall.com/lists/oss-security/2026/04/17/3 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |