{"api_version":"1","generated_at":"2026-10-06T21:46:39+00:00","cve":"CVE-2026-106452","urls":{"html":"https://cve.report/CVE-2026-106452","api":"https://cve.report/api/cve/CVE-2026-106452.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-106452","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-106452"},"summary":{"title":"yawkat LZ4 Java: LZ4BlockInputStream allocates an unvalidated compressed length from the stream header","description":"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. 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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.","Type":"Description","Title":"yawkat LZ4 Java: LZ4BlockInputStream allocates an unvalidated co"}]}}}