CVEvulnerability
CVE-2026-33558
5.3 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2026-04-20
- Last modified
- 2026-10-26
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weaknesses
- CWE-533
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.
Affected configurations
• apache kafka (>= 0.11.0.0 < 3.9.2)
• apache kafka 4.0.0
Related
Weakness · not in database (1)
References
- https://kafka.apache.org/cve-list Vendor Advisory
- https://lists.apache.org/thread/pz5g4ky3h0k91tfd14p0dzqjp80960kl Mitigation, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/04/17/3 Mailing List