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{"bugzilla": {"description": "lz4-java: lz4-java: Information Disclosure via Insufficient Output Buffer Clearing", "id": "2419500", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2419500"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-908", "details": ["A flaw was found in lz4-java. This vulnerability allows disclosure of sensitive data via crafted compressed input due to insufficient clearing of the output buffer in Java-based decompressor implementations."], "name": "CVE-2025-66566", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Under investigation", "package_name": "jmc:rhel8/lz4-java", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:amq_streams:3", "fix_state": "Under investigation", "package_name": "lz4-java", "product_name": "streams for Apache Kafka 3"}], "public_date": "2025-12-05T18:10:16Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-66566\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-66566\nhttps://github.com/yawkat/lz4-java/commit/33d180cb70c4d93c80fb0dc3ab3002f457e93840\nhttps://github.com/yawkat/lz4-java/security/advisories/GHSA-cmp6-m4wj-q63q"], "statement": "This vulnerability is rated IMPORTANT because it allows for information disclosure when Java-based decompressor implementations reuse output buffers without proper clearing, potentially exposing sensitive data via crafted compressed input. JNI-based implementations of lz4-java are not affected by this issue.", "threat_severity": "Important"}