{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-59949","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-07-07T18:49:15.607Z","datePublished":"2026-08-18T14:58:08.615Z","dateUpdated":"2026-08-18T17:46:55.526Z"},"containers":{"cna":{"title":"yawkat LZ4 Java: JVM Crash via Null Byte Array in lz4-java Streaming XXHash JNI (StreamingXXHash32JNI / StreamingXXHash64JNI)","problemTypes":[{"descriptions":[{"cweId":"CWE-476","lang":"en","description":"CWE-476: NULL Pointer Dereference","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/yawkat/lz4-java/security/advisories/GHSA-xx22-p4ch-683r","tags":["x_refsource_CONFIRM"],"url":"https://github.com/yawkat/lz4-java/security/advisories/GHSA-xx22-p4ch-683r"},{"name":"https://github.com/yawkat/lz4-java/commit/dbd86d04b8dd716e1c2bc626be54189997d910da","tags":["x_refsource_MISC"],"url":"https://github.com/yawkat/lz4-java/commit/dbd86d04b8dd716e1c2bc626be54189997d910da"},{"name":"https://github.com/yawkat/lz4-java/releases/tag/v1.11.1","tags":["x_refsource_MISC"],"url":"https://github.com/yawkat/lz4-java/releases/tag/v1.11.1"}],"affected":[{"vendor":"yawkat","product":"lz4-java","versions":[{"version":"< 1.11.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-18T14:58:08.615Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-xx22-p4ch-683r","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-18T17:19:17.863670Z","id":"CVE-2026-59949","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-18T17:46:55.526Z"}}]}}