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In applications where the output buffer is reused without being cleared, this may lead to disclosure of sensitive data.\n\nJNI-based implementations are *not* affected.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-66566.json","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-66566.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2025-66566","reference_id":"","reference_type":"","scores":[{"value":"0.00054","scoring_system":"epss","scoring_elements":"0.17181","published_at":"2026-05-30T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2025-66566"},{"reference_url":"https://github.com/yawkat/lz4-java","reference_id":"","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/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/yawkat/lz4-java"},{"reference_url":"https://github.com/yawkat/lz4-java/commit/33d180cb70c4d93c80fb0dc3ab3002f457e93840","reference_id":"","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/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:Y/T:P/P:M/B:A/M:M/D:T/2025-12-05T18:27:10Z/"}],"url":"https://github.com/yawkat/lz4-java/commit/33d180cb70c4d93c80fb0dc3ab3002f457e93840"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1122026","reference_id":"1122026","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1122026"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=2419500","reference_id":"2419500","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2419500"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2025-66566","reference_id":"CVE-2025-66566","reference_type":"","scores":[{"value":"8.2","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/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-2025-66566"},{"reference_url":"https://github.com/advisories/GHSA-cmp6-m4wj-q63q","reference_id":"GHSA-cmp6-m4wj-q63q","reference_type":"","scores":[{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-cmp6-m4wj-q63q"},{"reference_url":"https://github.com/yawkat/lz4-java/security/advisories/GHSA-cmp6-m4wj-q63q","reference_id":"GHSA-cmp6-m4wj-q63q","reference_type":"","scores":[{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"8.2","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/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:Y/T:P/P:M/B:A/M:M/D:T/2025-12-05T18:27:10Z/"}],"url":"https://github.com/yawkat/lz4-java/security/advisories/GHSA-cmp6-m4wj-q63q"},{"reference_url":"https://access.redhat.com/errata/RHSA-2026:0131","reference_id":"RHSA-2026:0131","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2026:0131"},{"reference_url":"https://access.redhat.com/errata/RHSA-2026:0134","reference_id":"RHSA-2026:0134","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2026:0134"},{"reference_url":"https://access.redhat.com/errata/RHSA-2026:0467","reference_id":"RHSA-2026:0467","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2026:0467"},{"reference_url":"https://access.redhat.com/errata/RHSA-2026:0468","reference_id":"RHSA-2026:0468","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2026:0468"},{"reference_url":"https://access.redhat.com/errata/RHSA-2026:0726","reference_id":"RHSA-2026:0726","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2026:0726"},{"reference_url":"https://access.redhat.com/errata/RHSA-2026:0751","reference_id":"RHSA-2026:0751","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2026:0751"},{"reference_url":"https://access.redhat.com/errata/RHSA-2026:0752","reference_id":"RHSA-2026:0752","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2026:0752"},{"reference_url":"https://access.redhat.com/errata/RHSA-2026:0761","reference_id":"RHSA-2026:0761","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2026:0761"},{"reference_url":"https://access.redhat.com/errata/RHSA-2026:1823","reference_id":"RHSA-2026:1823","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2026:1823"},{"reference_url":"https://access.redhat.com/errata/RHSA-2026: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