{"id":"CVE-2026-59949","aliases":["GHSA-xx22-p4ch-683r"],"url":"https://o3.security/vulnerability/CVE-2026-59949","summary":"yawkat LZ4 Java: JVM Crash via Null Byte Array in lz4-java Streaming XXHash JNI (StreamingXXHash32JNI / StreamingXXHash64JNI)","details":"yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.1, JNI-backed XXHash implementations fail to validate the byte array object and the off and len arguments in XXHashFactory.nativeInstance().hash32().hash(), XXHashFactory.nativeInstance().hash64().hash(), XXHashFactory.nativeInstance().newStreamingHash32().update(), and XXHashFactory.nativeInstance().newStreamingHash64().update(), allowing null arrays or oversized ranges to reach native code, read outside the Java array, and fatally terminate the JVM. This issue is fixed in version 1.11.1.","published":"2026-08-18T14:58:08.615Z","modified":"2026-08-20T10:17:16.207582Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H"},"epss":{"score":0.00453,"percentile":0.37897,"asOf":"2026-09-07"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"at.yawk.lz4:lz4-java","fixedVersion":"1.11.1"},{"ecosystem":"Maven","name":"org.lz4:lz4-java","fixedVersion":null}],"fix":{"url":"https://github.com/yawkat/lz4-java/commit/dbd86d04b8dd716e1c2bc626be54189997d910da","label":"yawkat/lz4-java@dbd86d0"},"references":[{"type":"WEB","url":"https://github.com/yawkat/lz4-java/releases/tag/v1.11.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59949.json"},{"type":"ADVISORY","url":"https://github.com/yawkat/lz4-java/security/advisories/GHSA-xx22-p4ch-683r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59949"},{"type":"FIX","url":"https://github.com/yawkat/lz4-java/commit/dbd86d04b8dd716e1c2bc626be54189997d910da"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-20T10:17:16.207582Z"}}