{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.11.2"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0569f2e80433ac67f89616364a8f584ec3b20c45"
            }
          ],
          "repo": "https://github.com/yawkat/lz4-java",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-4v53-57pg-c464"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-789"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106452.json"
  },
  "details": "yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.2, net.jpountz.lz4.LZ4BlockInputStream refill() validates that the compressedLen field in a legacy LZ4Block header is nonnegative but allocates a compressed-input buffer of that attacker-controlled size before reading payload data, allowing a header-only stream to request a near-2 GiB allocation and exhaust the JVM heap. Canonical writers emit raw blocks when compression is not smaller than the original block, but vulnerable readers accept non-canonical oversized compressed blocks. This issue is fixed in version 1.11.2.",
  "id": "CVE-2026-106452",
  "modified": "2026-10-07T10:30:21.994246759Z",
  "published": "2026-10-06T19:52:37.818Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106452.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/yawkat/lz4-java/commit/bb83dd16163cdb71231af06b0a5651881148a634"
    },
    {
      "type": "WEB",
      "url": "https://github.com/yawkat/lz4-java/releases/tag/v1.11.2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/yawkat/lz4-java/security/advisories/GHSA-4v53-57pg-c464"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-106452"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "yawkat LZ4 Java: LZ4BlockInputStream allocates an unvalidated compressed length from the stream header"
}