{"id":"CVE-2025-27821","aliases":["GHSA-92cc-952p-v8rh"],"url":"https://o3.security/vulnerability/CVE-2025-27821","summary":"HDFS native client: Out of bounds write in URI parser of native HDFS client","details":"Out-of-bounds Write vulnerability in Apache Hadoop HDFS native client.\n\nThis issue affects Apache Hadoop: from 3.2.0 before 3.4.2.\n\nUsers are recommended to upgrade to version 3.4.2, which fixes the issue.","published":"2026-01-26T09:44:13.532Z","modified":"2026-08-12T03:51:45.234954426Z","cvss":{"score":7.3,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.apache.hadoop:hadoop-hdfs-native-client","fixedVersion":"3.4.2"}],"fix":null,"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/01/23/7"},{"type":"WEB","url":"https://repo.maven.apache.org/maven2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27821.json"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/kwjhyyx0wl2z9b0mw0styjk0hhdbyplh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-27821"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:45.234954426Z"}}