{"answers":{"affected":"5 open source packages ship an affected version, including org.apache.zookeeper:zookeeper and zookeeper. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-24281 in the wild and no public exploit code.","fix":"Upgrade org.apache.zookeeper:zookeeper to a fixed version for your release line: 3.8.6 or 3.9.5.","what":"CVE-2026-24281 is a medium-severity vulnerability in Apache ZooKeeper, published on 7 Mar 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-2026-24281 and fix it if it is affected.\n\nWhat it is: CVE-2026-24281 is a medium-severity vulnerability in Apache ZooKeeper, published on 7 Mar 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-2026-24281 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.apache.zookeeper:zookeeper (Maven): affected from 3.8.0; fixed in 3.8.6\n- org.apache.zookeeper:zookeeper (Maven): affected from 3.8.0; fixed in 3.8.6\n- org.apache.zookeeper:zookeeper (Maven): affected from 3.9.0; fixed in 3.9.5\n- org.apache.zookeeper:zookeeper (Maven): affected from 3.9.0; fixed in 3.9.5\n- zookeeper (Bitnami): affected from 3.8.0; fixed in 3.8.6, 3.9.5\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-2026-24281/ (Markdown: https://insights.sbomify.com/CVE-2026-24281/index.md)","id":"CVE-2026-24281","markdown":"https://insights.sbomify.com/CVE-2026-24281/index.md","name":"CVE-2026-24281","record":{"aliases":["BIT-zookeeper-2026-24281","CLEANSTART-2026-AS23649","CLEANSTART-2026-UU38488","DEBIAN-CVE-2026-24281","ECHO-6fcc-5bac-4e91","GHSA-7xrh-hqfc-g7qr","MINI-27xw-8vjg-944g","MINI-37v7-9qwp-9fg3","MINI-5c2x-33cm-xrcg","MINI-6pmm-qvgm-c4m4","MINI-7fp3-fc2h-5q79","MINI-8pqr-hq5p-wm53","MINI-8rf9-54mc-rhx9","MINI-9h9j-h6pc-x58m","MINI-fv68-q9vg-8xxc","MINI-pghp-387v-7w4f","MINI-r269-prwq-g7f2","MINI-r4vr-h5fw-63mg","MINI-rrcc-52q2-pg8h","MINI-rxx6-qwxm-67xc","MINI-v538-hw96-ff42","MINI-vgrp-q6f5-q8h3","MINI-xhf8-4pfp-fphv","RHLW-2026-3837a83be413601a","RHLW-2026-67695bc80de4b2e2","ROOT-APP-MAVEN-CVE-2026-24281","UBUNTU-CVE-2026-24281"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Apache ZooKeeper","requires_auth":"none","summary":"Attackers can bypass hostname verification in Apache ZooKeeper by spoofing reverse DNS records, potentially impersonating servers or clients.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"zookeeper","vendor":"apache"}],"cvss":{"score":5.9,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-350","name":"Reliance on Reverse DNS Resolution for a Security-Critical Action"},{"id":"CWE-295","name":"Improper Certificate Validation"}],"description":"Hostname verification in Apache ZooKeeper ZKTrustManager falls back to reverse DNS (PTR) when IP SAN validation fails, allowing attackers who control or spoof PTR records to impersonate ZooKeeper servers or clients with a valid certificate for the PTR name. It's important to note that attacker must present a certificate which is trusted by ZKTrustManager which makes the attack vector harder to exploit. Users are recommended to upgrade to version 3.8.6 or 3.9.5, which fixes this issue by introducing a new configuration option to disable reverse DNS lookup in client and quorum protocols.","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 ZooKeeper: Reverse-DNS fallback enables hostname verification bypass in ZooKeeper ZKTrustManager","id":"CVE-2026-24281","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":5,"n_references":1,"next":{"headline":"Push message Routing Service Elevation of Privilege Vulnerability","id":"CVE-2026-24282"},"packages":[{"ecosystem":"Bitnami","fixed":["3.8.6","3.9.5"],"introduced":["3.8.0","3.9.0"],"last_affected":[],"package":"zookeeper","purl":"pkg:bitnami/zookeeper","source":"BIT-zookeeper-2026-24281"},{"ecosystem":"Maven","fixed":["3.8.6"],"introduced":["3.8.0"],"last_affected":[],"package":"org.apache.zookeeper:zookeeper","purl":null,"source":"GHSA-7xrh-hqfc-g7qr"},{"ecosystem":"Maven","fixed":["3.8.6"],"introduced":["3.8.0"],"last_affected":[],"package":"org.apache.zookeeper:zookeeper","purl":"pkg:maven/org.apache.zookeeper/zookeeper","source":"GHSA-7xrh-hqfc-g7qr"},{"ecosystem":"Maven","fixed":["3.9.5"],"introduced":["3.9.0"],"last_affected":[],"package":"org.apache.zookeeper:zookeeper","purl":null,"source":"GHSA-7xrh-hqfc-g7qr"},{"ecosystem":"Maven","fixed":["3.9.5"],"introduced":["3.9.0"],"last_affected":[],"package":"org.apache.zookeeper:zookeeper","purl":"pkg:maven/org.apache.zookeeper/zookeeper","source":"GHSA-7xrh-hqfc-g7qr"}],"prev":{"headline":"Memory corruption in TensorRT","id":"CVE-2026-24272"},"products":["Apache ZooKeeper"],"published":"2026-03-07","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":"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":"2026-07-15","vendors":["Apache Software Foundation"]},"summary":"Attackers can bypass hostname verification in Apache ZooKeeper by spoofing reverse DNS records, potentially impersonating servers or clients.","url":"https://insights.sbomify.com/CVE-2026-24281/"}