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Configuration values are exposed at INFO level logging rendering potential production systems affected by the issue. Users are recommended to upgrade to version 3.8.6 or 3.9.5 which fixes this issue.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-24308.json","reference_id":"","reference_type":"","scores":[{"value":"3.3","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-24308.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2026-24308","reference_id":"","reference_type":"","scores":[{"value":"0.00021","scoring_system":"epss","scoring_elements":"0.05512","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00021","scoring_system":"epss","scoring_elements":"0.05477","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00024","scoring_system":"epss","scoring_elements":"0.06615","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00024","scoring_system":"epss","scoring_elements":"0.06577","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00024","scoring_system":"epss","scoring_elements":"0.0662","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00024","scoring_system":"epss","scoring_elements":"0.06613","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00024","scoring_system":"epss","scoring_elements":"0.06604","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00024","scoring_system":"epss","scoring_elements":"0.06595","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00024","scoring_system":"epss","scoring_elements":"0.06523","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00024","scoring_system":"epss","scoring_elements":"0.06531","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00024","scoring_system":"epss","scoring_elements":"0.06574","published_at":"2026-04-21T12:55:00Z"},{"value":"0.00024","scoring_system":"epss","scoring_elements":"0.06592","published_at":"2026-04-24T12:55:00Z"},{"value":"0.00024","scoring_system":"epss","scoring_elements":"0.06608","published_at":"2026-04-26T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-24308"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-24308","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-24308"},{"reference_url":"https://github.com/apache/zookeeper","reference_id":"","reference_type":"","scores":[{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/apache/zookeeper"},{"reference_url":"https://github.com/apache/zookeeper/releases/tag/release-3.8.6","reference_id":"","reference_type":"","scores":[{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/apache/zookeeper/releases/tag/release-3.8.6"},{"reference_url":"https://github.com/apache/zookeeper/releases/tag/release-3.9.5","reference_id":"","reference_type":"","scores":[{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/apache/zookeeper/releases/tag/release-3.9.5"},{"reference_url":"https://lists.apache.org/thread/qng3rtzv2pqkmko4rhv85jfplkyrgqdr","reference_id":"","reference_type":"","scores":[{"value":"6.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA: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/2026-03-10T17:34:03Z/"}],"url":"https://lists.apache.org/thread/qng3rtzv2pqkmko4rhv85jfplkyrgqdr"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-24308","reference_id":"","reference_type":"","scores":[{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-24308"},{"reference_url":"http://www.openwall.com/lists/oss-security/2026/03/07/5","reference_id":"","reference_type":"","scores":[{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"http://www.openwall.com/lists/oss-security/2026/03/07/5"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1130497","reference_id":"1130497","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1130497"},{"reference_url":"https://bugzilla.redhat.com/show_bug.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ZooKeeper: Reverse-DNS fallback enables hostname verification bypass in ZooKeeper ZKTrustManager\nHostname 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.","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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