{
  "cvss": 6.5,
  "datePublished": "2026-08-18T15:16:56.160",
  "dateUpdated": "2026-10-22T22:10:00.250",
  "description": "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.",
  "id": "CVE-2026-59949",
  "raw": {
    "affected": [
      {
        "affectedData": [
          {
            "product": "lz4-java",
            "vendor": "yawkat",
            "versions": [
              {
                "status": "affected",
                "version": "< 1.11.1"
              }
            ]
          }
        ],
        "source": "security-advisories@github.com"
      }
    ],
    "cveTags": [],
    "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."
      },
      {
        "lang": "es",
        "value": "yawkat LZ4 Java proporciona compresión LZ4 para Java. Antes de la versión 1.11.1, las implementaciones XXHash respaldadas por JNI no validan el objeto de array de bytes y los argumentos off y len en XXHashFactory.nativeInstance().hash32().hash(), XXHashFactory.nativeInstance().hash64().hash(), XXHashFactory.nativeInstance().newStreamingHash32().update(), y XXHashFactory.nativeInstance().newStreamingHash64().update(), permitiendo que arrays nulos o rangos sobredimensionados alcancen código nativo, lean fuera del array de Java y terminen fatalmente la JVM. Este problema se ha corregido en la versión 1.11.1."
      }
    ],
    "id": "CVE-2026-59949",
    "lastModified": "2026-10-22T22:10:00.250",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "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"
          },
          "exploitabilityScore": 2.2,
          "impactScore": 4.2,
          "source": "security-advisories@github.com",
          "type": "Secondary"
        }
      ],
      "ssvcV203": [
        {
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "ssvcData": {
            "id": "CVE-2026-59949",
            "options": [
              {
                "exploitation": "none"
              },
              {
                "automatable": "no"
              },
              {
                "technicalImpact": "partial"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-08-18T17:19:17.863670Z",
            "version": "2.0.3"
          }
        }
      ]
    },
    "published": "2026-08-18T15:16:56.160",
    "references": [
      {
        "source": "security-advisories@github.com",
        "url": "https://github.com/yawkat/lz4-java/commit/dbd86d04b8dd716e1c2bc626be54189997d910da"
      },
      {
        "source": "security-advisories@github.com",
        "url": "https://github.com/yawkat/lz4-java/releases/tag/v1.11.1"
      },
      {
        "source": "security-advisories@github.com",
        "url": "https://github.com/yawkat/lz4-java/security/advisories/GHSA-xx22-p4ch-683r"
      }
    ],
    "sourceIdentifier": "security-advisories@github.com",
    "vulnStatus": "Deferred",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-476"
          }
        ],
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "severity": "MEDIUM",
  "source": "nvd",
  "title": "yawkat LZ4 Java provides LZ4 compression for Java"
}