{"answers":{"affected":"5 open source packages ship an affected version, including org.apache.kafka:kafka-clients and kafka. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-33558 in the wild and no public exploit code.","fix":"Upgrade org.apache.kafka:kafka-clients to a fixed version for your release line: 3.9.2 or 4.0.1.","what":"CVE-2026-33558 is a medium-severity vulnerability in Apache Kafka, published on 20 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-33558 and fix it if it is affected.\n\nWhat it is: CVE-2026-33558 is a medium-severity vulnerability in Apache Kafka, published on 20 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-33558 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.apache.kafka:kafka-clients (Maven): affected from 0.11.0; fixed in 3.9.2\n- org.apache.kafka:kafka-clients (Maven): affected from 0.11.0; fixed in 3.9.2\n- org.apache.kafka:kafka-clients (Maven): affected from 4.0.0; fixed in 4.0.1\n- org.apache.kafka:kafka-clients (Maven): affected from 4.0.0; fixed in 4.0.1\n- kafka (Bitnami): affected from 0.11.0; fixed in 3.9.2, 4.0.1\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-33558/ (Markdown: https://insights.sbomify.com/CVE-2026-33558/index.md)","id":"CVE-2026-33558","markdown":"https://insights.sbomify.com/CVE-2026-33558/index.md","name":"CVE-2026-33558","record":{"aliases":["BIT-kafka-2026-33558","CLEANSTART-2026-GB58847","CLEANSTART-2026-GO69632","CLEANSTART-2026-KN06820","CLEANSTART-2026-MN19419","CLEANSTART-2026-YH51539","ECHO-5b43-5c55-4671","GHSA-wf66-mphr-4c4r","MINI-2f8w-p58c-fp9q","MINI-39cf-9jvx-phqh","MINI-3hhw-vhmh-x577","MINI-48r9-7xpg-cgp4","MINI-4rj7-9m56-xjh4","MINI-4w65-qhxg-8px3","MINI-6w44-5m9f-vxqj","MINI-72f6-7r9f-4cp4","MINI-83p2-3fjh-hvfv","MINI-cmh2-2p4p-4c62","MINI-gcx9-x85r-3pf6","MINI-gw8x-8w5p-2r4v","MINI-hqgv-7r2r-q857","MINI-j44f-7q83-xf3r","MINI-m2mv-qgfg-x7pj","MINI-ph8v-8478-4mmc","MINI-px4v-mhhq-wqm5","MINI-qcxv-cxpr-6qmw","MINI-rfhr-qc26-chj6","MINI-rq5c-fgp3-8vxc","MINI-v4j9-rxq3-hcvx","MINI-x4vx-65xj-6rvq","MINI-xf3j-c755-vjr3","ROOT-APP-MAVEN-CVE-2026-33558","UBUNTU-CVE-2026-33558"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":true,"product_category":"Apache Kafka","requires_auth":"none","summary":"Attackers with log access can view sensitive credentials and tokens if DEBUG logging is enabled in Apache Kafka NetworkClient.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"kafka","vendor":"apache"}],"cvss":{"score":5.3,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-533","name":"DEPRECATED: Information Exposure Through Server Log Files"}],"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  *  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\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.","ecosystems":["Bitnami","Maven"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Apache Kafka, Apache Kafka Clients: Information Exposure Through Network Client Log Output","id":"CVE-2026-33558","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":null,"products":[],"type":"information_disclosure","year":"2026"},"n_packages":5,"n_references":2,"next":{"headline":"Cross-site scripting in OpenStreetMap","id":"CVE-2026-33559"},"packages":[{"ecosystem":"Bitnami","fixed":["3.9.2","4.0.1"],"introduced":["0.11.0","4.0.0"],"last_affected":[],"package":"kafka","purl":"pkg:bitnami/kafka","source":"BIT-kafka-2026-33558"},{"ecosystem":"Maven","fixed":["3.9.2"],"introduced":["0.11.0"],"last_affected":[],"package":"org.apache.kafka:kafka-clients","purl":null,"source":"GHSA-wf66-mphr-4c4r"},{"ecosystem":"Maven","fixed":["3.9.2"],"introduced":["0.11.0"],"last_affected":[],"package":"org.apache.kafka:kafka-clients","purl":"pkg:maven/org.apache.kafka/kafka-clients","source":"GHSA-wf66-mphr-4c4r"},{"ecosystem":"Maven","fixed":["4.0.1"],"introduced":["4.0.0"],"last_affected":[],"package":"org.apache.kafka:kafka-clients","purl":null,"source":"GHSA-wf66-mphr-4c4r"},{"ecosystem":"Maven","fixed":["4.0.1"],"introduced":["4.0.0"],"last_affected":[],"package":"org.apache.kafka:kafka-clients","purl":"pkg:maven/org.apache.kafka/kafka-clients","source":"GHSA-wf66-mphr-4c4r"}],"prev":{"headline":"Apache Kafka: Missing JWT token validation in OAUTHBEARER authentication","id":"CVE-2026-33557"},"products":["Apache Kafka","Apache Kafka Clients"],"published":"2026-04-20","related":[{"cvss_score":9.1,"headline":"Apache Kafka: Missing JWT token validation in OAUTHBEARER authentication","id":"CVE-2026-33557","kev_date_added":null,"published":"2026-04-20"},{"cvss_score":8.8,"headline":"Apache Kafka: Possible RCE attack via SASL JAAS LdapLoginModule configuration","id":"CVE-2025-27818","kev_date_added":null,"published":"2025-06-10"},{"cvss_score":8.8,"headline":"Improper Input Validation in Apache Kafka","id":"CVE-2018-17196","kev_date_added":null,"published":"2019-07-11"},{"cvss_score":8.7,"headline":"Apache Kafka Clients: Kafka Producer Message Corruption and Misrouting via Buffer Pool Race Condition","id":"CVE-2026-35554","kev_date_added":null,"published":"2026-04-07"},{"cvss_score":7.5,"headline":"Apache Kafka Client: Arbitrary file read and SSRF vulnerability","id":"CVE-2025-27817","kev_date_added":null,"published":"2025-06-10"},{"cvss_score":7.5,"headline":"Apache Kafka: Possible RCE/Denial of service attack via SASL JAAS JndiLoginModule configuration","id":"CVE-2025-27819","kev_date_added":null,"published":"2025-06-10"},{"cvss_score":7.5,"headline":"Unauthenticated clients may cause OutOfMemoryError on Apache Kafka Brokers","id":"CVE-2022-34917","kev_date_added":null,"published":"2022-09-20"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-20","vendors":["Apache Software Foundation"]},"summary":"Attackers with log access can view sensitive credentials and tokens if DEBUG logging is enabled in Apache Kafka NetworkClient.","url":"https://insights.sbomify.com/CVE-2026-33558/"}