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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.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-24281.json","reference_id":"","reference_type":"","scores":[{"value":"7.4","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-24281.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2026-24281","reference_id":"","reference_type":"","scores":[{"value":"0.00026","scoring_system":"epss","scoring_elements":"0.07113","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00026","scoring_system":"epss","scoring_elements":"0.07058","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00026","scoring_system":"epss","scoring_elements":"0.07088","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00029","scoring_system":"epss","scoring_elements":"0.08203","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00029","scoring_system":"epss","scoring_elements":"0.08185","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00029","scoring_system":"epss","scoring_elements":"0.08042","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00029","scoring_system":"epss","scoring_elements":"0.08057","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00029","scoring_system":"epss","scoring_elements":"0.08157","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00029","scoring_system":"epss","scoring_elements":"0.08174","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00029","scoring_system":"epss","scoring_elements":"0.08194","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00039","scoring_system":"epss","scoring_elements":"0.11597","published_at":"2026-04-24T12:55:00Z"},{"value":"0.00039","scoring_system":"epss","scoring_elements":"0.11487","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00039","scoring_system":"epss","scoring_elements":"0.11558","published_at":"2026-04-26T12:55:00Z"},{"value":"0.00039","scoring_system":"epss","scoring_elements":"0.11641","published_at":"2026-04-21T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-24281"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-24281","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-24281"},{"reference_url":"https://github.com/apache/zookeeper","reference_id":"","reference_type":"","scores":[{"value":"7.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/apache/zookeeper"},{"reference_url":"https://github.com/apache/zookeeper/commit/66c4efecdda1302d9cfb3af9eedb122b74452bf3","reference_id":"","reference_type":"","scores":[{"value":"7.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/apache/zookeeper/commit/66c4efecdda1302d9cfb3af9eedb122b74452bf3"},{"reference_url":"https://issues.apache.org/jira/browse/ZOOKEEPER-4986","reference_id":"","reference_type":"","scores":[{"value":"7.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://issues.apache.org/jira/browse/ZOOKEEPER-4986"},{"reference_url":"https://lists.apache.org/thread/088ddsbrzhd5lxzbqf5n24yg0mwh9jt2","reference_id":"","reference_type":"","scores":[{"value":"5.9","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"value":"7.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-10T17:36:42Z/"}],"url":"https://lists.apache.org/thread/088ddsbrzhd5lxzbqf5n24yg0mwh9jt2"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-24281","reference_id":"","reference_type":"","scores":[{"value":"7.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-24281"},{"reference_url":"http://www.openwall.com/lists/oss-security/2026/03/07/4","reference_id":"","reference_type":"","scores":[{"value":"7.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"http://www.openwall.com/lists/oss-security/2026/03/07/4"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1130496","reference_id":"1130496","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1130496"},{"reference_url":"h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ZooKeeper: Insufficient Permission Check in AdminServer Snapshot/Restore Commands\nImproper permission checks in the AdminServer allow an authenticated client with insufficient privileges to invoke the `snapshot` and `restore` commands. The intended requirement is authentication and authorization on the root path (`/`) with **ALL** permission for these operations; however, affected versions permit invocation without that level of authorization. The primary risk is disclosure of cluster state via snapshots to a lesser-privileged client.\n\n*   **Affected:** `org.apache.zookeeper:zookeeper` 3.9.0 through 3.9.3.\n*   **Fixed:** 3.9.4 (ZOOKEEPER-4964 “check permissions individually during admin server auth”).\n*   **Mitigations:**\n*   Disable both commands (`admin.snapshot.enabled`, `admin.restore.enabled`).\n*   Disable AdminServer (`admin.enableServer`).\n*   Ensure the root ACL is not open; note that ZooKeeper ACLs are not recursive.\n*   Upgrade to 3.9.4.","references":[{"reference_url":"http://github.com/apache/zookeeper/commit/71e173fcbcc9deb784081cf867bd045df3c32635","reference_id":"","reference_type":"","scores":[{"value":"4.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"http://github.com/apache/zookeeper/commit/71e173fcbcc9deb784081cf867bd045df3c32635"},{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-58457.json","reference_id":"","reference_type":"","scores":[{"value":"4.3","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-58457.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2025-58457","reference_id":"","reference_type":"","scores":[{"value":"0.00108","scoring_system":"epss","scoring_elements":"0.28968","published_at":"2026-04-21T12:55:00Z"},{"value":"0.00131","scoring_system":"epss","scoring_elements":"0.3257","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00131","scoring_system":"epss","scoring_elements":"0.32598","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00131","scoring_system":"epss","scoring_elements":"0.32636","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00131","scoring_system":"epss","scoring_elements":"0.32634","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00131","scoring_system":"epss","scoring_elements":"0.32608","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00131","scoring_system":"epss","scoring_elements":"0.32561","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00131","scoring_system":"epss","scoring_elements":"0.3274","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00131","scoring_system":"epss","scoring_elements":"0.32705","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00131","scoring_system":"epss","scoring_elements":"0.32585","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00131","scoring_system":"epss","scoring_elements":"0.32609","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00141","scoring_system":"epss","scoring_elements":"0.33731","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00141","scoring_system":"epss","scoring_elements":"0.3384","published_at":"2026-04-24T12:55:00Z"},{"value":"0.00141","scoring_system":"epss","scoring_elements":"0.33817","published_at":"2026-04-26T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2025-58457"},{"reference_url":"https://github.com/apache/zookeeper","reference_id":"","reference_type":"","scores":[{"value":"4.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/apache/zookeeper"},{"reference_url":"https://lists.apache.org/thread/r5yol0kkhx2fzw22pxk1ozwm3oc6yxrx","reference_id":"","reference_type":"","scores":[{"value":"4.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-09-24T13:47:31Z/"}],"url":"https://lists.apache.org/thread/r5yol0kkhx2fzw22pxk1ozwm3oc6yxrx"},{"reference_url":"https://zookeeper.apache.org/doc/current/zookeeperSnapshotAndRestore.html","reference_id":"","reference_type":"","scores":[{"value":"4.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://zookeeper.apache.org/doc/current/zookeeperSnapshotAndRestore.html"},{"reference_url":"https://zookeeper.apache.org/doc/r3.9.4/releasenotes.html","reference_id":"","reference_type":"","scores":[{"value":"4.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://zookeeper.apache.org/doc/r3.9.4/releasenotes.html"},{"reference_url":"https://zookeeper.apache.org/security.html#CVE-2025-58457","reference_id":"","reference_type":"","scores":[{"value":"4.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://zookeeper.apache.org/security.html#CVE-2025-58457"},{"reference_url":"http://www.openwall.com/lists/oss-security/2025/09/24/10","reference_id":"","reference_type":"","scores":[{"value":"4.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"http://www.openwall.com/lists/oss-security/2025/09/24/10"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1116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