{"answers":{"affected":"6 open source packages ship an affected version, including org.apache.kafka:kafka-clients. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-35554 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, 4.0.2 or 4.1.2.","what":"CVE-2026-35554 is a high-severity vulnerability in Apache Kafka Clients, published on 7 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-2026-35554 and fix it if it is affected.\n\nWhat it is: CVE-2026-35554 is a high-severity vulnerability in Apache Kafka Clients, published on 7 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-2026-35554 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.apache.kafka:kafka-clients (Maven): affected from 2.8.0; fixed in 3.9.2\n- org.apache.kafka:kafka-clients (Maven): affected from 2.8.0; fixed in 3.9.2\n- org.apache.kafka:kafka-clients (Maven): affected from 4.0.0; fixed in 4.0.2\n- org.apache.kafka:kafka-clients (Maven): affected from 4.0.0; fixed in 4.0.2\n- org.apache.kafka:kafka-clients (Maven): affected from 4.1.0; fixed in 4.1.2\n- org.apache.kafka:kafka-clients (Maven): affected from 4.1.0; fixed in 4.1.2\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-2026-35554/ (Markdown: https://insights.sbomify.com/CVE-2026-35554/index.md)","id":"CVE-2026-35554","markdown":"https://insights.sbomify.com/CVE-2026-35554/index.md","name":"CVE-2026-35554","record":{"aliases":["CLEANSTART-2026-BR61448","CLEANSTART-2026-HV53222","CLEANSTART-2026-KI11233","CLEANSTART-2026-VH87962","CLEANSTART-2026-WO81380","ECHO-9d81-4fd7-174c","GHSA-5qcv-4rpc-jp93","MINI-226q-vv8f-vjqv","MINI-29m2-h68c-ff9m","MINI-2hw5-q54p-wmhp","MINI-447h-q994-qm5g","MINI-47pp-g4wv-mrrq","MINI-48ww-j2gr-x7cx","MINI-67wg-mrmh-2mj2","MINI-6fj3-vf4c-32jh","MINI-6mx5-x65q-43g3","MINI-73rj-h2g3-cr5r","MINI-7gqj-pc63-r8cp","MINI-89jv-8mqp-xph8","MINI-99xj-mq9h-997v","MINI-9r8q-h3r2-cv2m","MINI-c6px-jm5p-hgm7","MINI-f3gc-5hjr-v698","MINI-f65q-jjjm-63g9","MINI-fhwx-wjrg-xgqc","MINI-g848-fhqc-c6hq","MINI-gm3f-x9g5-hp96","MINI-h8f4-466m-977g","MINI-h9xv-765g-jrvp","MINI-hxw8-8cjq-fgxc","MINI-jf33-487f-3vcw","MINI-m5cp-4hx9-8x49","MINI-m9pc-9w9p-4wmq","MINI-pm7m-5qp3-w392","MINI-rh6m-6gg8-82x6","MINI-wq9h-fjpg-3f9q","MINI-x5pv-p73j-77pv","MINI-xx44-pfvw-w98x","ROOT-APP-MAVEN-CVE-2026-35554"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Kafka Java client","requires_auth":"none","summary":"A race condition in the Kafka producer client can cause messages to be silently delivered to incorrect topics, exposing sensitive data and corrupting downstream processing.","user_interaction":"not_required","vuln_class":"race_condition"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"kafka","vendor":"apache"}],"cvss":{"score":8.7,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"},{"id":"CWE-362","name":"Concurrent Execution using Shared Resource with Improper Synchronization"}],"description":"A race condition in the Apache Kafka Java producer client’s buffer pool management can cause messages to be silently delivered to incorrect topics.\n\nWhen a produce batch expires due to delivery.timeout.ms while a network request containing that batch is still in flight, the batch’s ByteBuffer is prematurely deallocated and returned to the buffer pool. If a subsequent producer batch—potentially destined for a different topic—reuses this freed buffer before the original network request completes, the buffer contents may become corrupted. This can result in messages being delivered to unintended topics without any error being reported to the producer.\n\nData Confidentiality:\nMessages intended for one topic may be delivered to a different topic, potentially exposing sensitive data to consumers who have access to the destination topic but not the intended source topic.\n\nData Integrity:\nConsumers on the receiving topic may encounter unexpected or incompatible messages, leading to deserialization failures, processing errors, and corrupted downstream data.\n\nThis issue affects Apache Kafka versions ≤ 3.9.1, ≤ 4.0.1, and  ≤ 4.1.1.\n\nKafka users are advised to upgrade to 3.9.2, 4.0.2, 4.1.2, 4.2.0, or later to address this vulnerability.","ecosystems":["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 Clients: Kafka Producer Message Corruption and Misrouting via Buffer Pool Race Condition","id":"CVE-2026-35554","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"race_condition","year":"2026"},"n_packages":6,"n_references":2,"next":{"headline":"Subnet Solutions PowerSYSTEM Center Incorrect Authorization","id":"CVE-2026-35555"},"packages":[{"ecosystem":"Maven","fixed":["3.9.2"],"introduced":["2.8.0"],"last_affected":[],"package":"org.apache.kafka:kafka-clients","purl":null,"source":"GHSA-5qcv-4rpc-jp93"},{"ecosystem":"Maven","fixed":["3.9.2"],"introduced":["2.8.0"],"last_affected":[],"package":"org.apache.kafka:kafka-clients","purl":"pkg:maven/org.apache.kafka/kafka-clients","source":"GHSA-5qcv-4rpc-jp93"},{"ecosystem":"Maven","fixed":["4.0.2"],"introduced":["4.0.0"],"last_affected":[],"package":"org.apache.kafka:kafka-clients","purl":null,"source":"GHSA-5qcv-4rpc-jp93"},{"ecosystem":"Maven","fixed":["4.0.2"],"introduced":["4.0.0"],"last_affected":[],"package":"org.apache.kafka:kafka-clients","purl":"pkg:maven/org.apache.kafka/kafka-clients","source":"GHSA-5qcv-4rpc-jp93"},{"ecosystem":"Maven","fixed":["4.1.2"],"introduced":["4.1.0"],"last_affected":[],"package":"org.apache.kafka:kafka-clients","purl":null,"source":"GHSA-5qcv-4rpc-jp93"},{"ecosystem":"Maven","fixed":["4.1.2"],"introduced":["4.1.0"],"last_affected":[],"package":"org.apache.kafka:kafka-clients","purl":"pkg:maven/org.apache.kafka/kafka-clients","source":"GHSA-5qcv-4rpc-jp93"}],"prev":{"headline":"Memory corruption in DRFEC.SYS","id":"CVE-2026-35553"},"products":["Apache Kafka Clients"],"published":"2026-04-07","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":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":"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-07","vendors":["Apache Software Foundation"]},"summary":"A race condition in the Kafka producer client can cause messages to be silently delivered to incorrect topics, exposing sensitive data and corrupting downstream processing.","url":"https://insights.sbomify.com/CVE-2026-35554/"}