{"answers":{"affected":"1 open source package ship an affected version, including zookeeper. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-84501 in the wild and no public exploit code.","fix":"Upgrade zookeeper to a fixed version for your release line: 3.8.7 or 3.9.6.","what":"CVE-2026-84501 is a medium-severity vulnerability in Apache ZooKeeper, published on 16 Sep 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-2026-84501 and fix it if it is affected.\n\nWhat it is: CVE-2026-84501 is a medium-severity vulnerability in Apache ZooKeeper, published on 16 Sep 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-2026-84501 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- zookeeper (Bitnami): affected from 3.8.0; fixed in 3.8.7, 3.9.6\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-2026-84501/ (Markdown: https://insights.sbomify.com/CVE-2026-84501/index.md)","id":"CVE-2026-84501","markdown":"https://insights.sbomify.com/CVE-2026-84501/index.md","name":"CVE-2026-84501","record":{"aliases":["BIT-zookeeper-2026-84501","CLEANSTART-2026-KR26174","CLEANSTART-2026-QQ07895","CLEANSTART-2026-XR18271","CLEANSTART-2026-ZA11117","DEBIAN-CVE-2026-84501","GHSA-mm24-r27q-hxg5","MINI-3rfw-j273-p428","MINI-m2rg-c72r-jgxp","UBUNTU-CVE-2026-84501"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Distributed coordination service","requires_auth":"none","summary":"Unauthenticated attackers can forge log entries in Apache ZooKeeper by injecting newlines into authentication requests, misleading operators.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"zookeeper","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:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-117","name":"Improper Output Neutralization for Logs"}],"description":"An unauthenticated attacker can inject arbitrary fake log lines into Apache ZooKeeper's operational log by sending a crafted add_auth(\"ensemble\", ...) request containing newline characters (\\n). When the ensemble name doesn't match, EnsembleAuthenticationProvider.handleAuthentication() logs the raw, unsanitized name via LOG.warn(). Because SLF4J's {} placeholder preserves embedded newlines, the attacker can forge complete log entries — with arbitrary timestamps, log levels, class names, and messages — that are visually indistinguishable from genuine ZooKeeper log output.\n\nThis issue affects Apache ZooKeeper: from 3.9.0 through 3.9.5, from 3.8.0 through 3.8.6.\n\nUsers are recommended to upgrade to version 3.8.7 or 3.9.6, which fixes the issue.","ecosystems":["Bitnami"],"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 ZooKeeper: Operational log forgery via newline injection in EnsembleAuthenticationProvider","id":"CVE-2026-84501","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":null,"products":[],"type":"other","year":"2026"},"n_packages":1,"n_references":1,"next":{"headline":"Command injection in Red Hat Ansible Automation Platform 2.4 for RHEL 8","id":"CVE-2026-84502"},"packages":[{"ecosystem":"Bitnami","fixed":["3.8.7","3.9.6"],"introduced":["3.8.0","3.9.0"],"last_affected":[],"package":"zookeeper","purl":"pkg:bitnami/zookeeper","source":"BIT-zookeeper-2026-84501"}],"prev":{"headline":"Information disclosure in Red Hat Ansible Automation Platform 2.5 for RHEL 8","id":"CVE-2026-84499"},"products":["Apache ZooKeeper"],"published":"2026-09-16","related":[{"cvss_score":9.1,"headline":"Apache ZooKeeper: Authentication bypass with IP-based authentication in Admin Server","id":"CVE-2024-51504","kev_date_added":null,"published":"2024-11-07"},{"cvss_score":9.1,"headline":"Apache ZooKeeper: Authorization bypass in SASL Quorum Peer Authentication","id":"CVE-2023-44981","kev_date_added":null,"published":"2023-10-11"},{"cvss_score":8.1,"headline":"Memory corruption in n/a","id":"CVE-2016-5017","kev_date_added":null,"published":"2016-09-21"},{"cvss_score":7.5,"headline":"Apache ZooKeeper: Information disclosure via SetWatches reconnect replay","id":"CVE-2026-59739","kev_date_added":null,"published":"2026-09-16"},{"cvss_score":7.5,"headline":"Apache ZooKeeper: Improper validation of certificate with host mismatch in FIPS mode","id":"CVE-2026-59969","kev_date_added":null,"published":"2026-09-16"},{"cvss_score":7.5,"headline":"Missing authorization in Apache ZooKeeper","id":"CVE-2026-79993","kev_date_added":null,"published":"2026-09-16"},{"cvss_score":7.5,"headline":"Missing Authorization in Apache ZooKeeper","id":"CVE-2018-8012","kev_date_added":null,"published":"2018-05-21"}],"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":"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":"2026-09-16","vendors":["Apache Software Foundation"]},"summary":"Unauthenticated attackers can forge log entries in Apache ZooKeeper by injecting newlines into authentication requests, misleading operators.","url":"https://insights.sbomify.com/CVE-2026-84501/"}