{"cve":"CVE-2026-33558","nvd":{"published":"2026-04-20T14:16:19.010","modified":"2026-10-26T21:10:00.170","status":"Analyzed","description":"Information exposure vulnerability has been identified in Apache Kafka.\n\nThe 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:\n\n\n  *  AlterConfigsRequest\n\n  *  AlterUserScramCredentialsRequest\n\n  *  ExpireDelegationTokenRequest\n\n  *  IncrementalAlterConfigsRequest\n\n  *  RenewDelegationTokenRequest\n\n  *  SaslAuthenticateRequest\n\n  *  createDelegationTokenResponse\n\n  *  describeDelegationTokenResponse\n\n  *  SaslAuthenticateResponse\n\n\nThis 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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3},"cwes":["CWE-533"],"references":["https://kafka.apache.org/cve-list","https://lists.apache.org/thread/pz5g4ky3h0k91tfd14p0dzqjp80960kl","http://www.openwall.com/lists/oss-security/2026/04/17/3"],"products":["apache:kafka"],"source":"nvd","synced_at":"2026-10-26T21:38:48.864438205+00:00"},"epss":{"cve":"CVE-2026-33558","score":0.0063,"percentile":0.49936,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-wf66-mphr-4c4r","url":"https://osv.dev/vulnerability/GHSA-wf66-mphr-4c4r","summary":"Apache Kafka exposes sensitive information in its DEBUG logs","modified":"2026-09-10T03:50:44.906549649Z","packages":[{"ecosystem":"Maven","name":"org.apache.kafka:kafka-clients","purl":"pkg:maven/org.apache.kafka/kafka-clients","ranges":[">=0.11.0 <3.9.2"],"fixed":["3.9.2"]},{"ecosystem":"Maven","name":"org.apache.kafka:kafka-clients","purl":"pkg:maven/org.apache.kafka/kafka-clients","ranges":[">=4.0.0 <4.0.1"],"fixed":["4.0.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}