{"id":"CVE-2026-106452","revision":"0c3d701f940e484bac5763286ea90b77","records":[{"revision":"0c3d701f940e484bac5763286ea90b77","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-106452","aliases":[],"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. This issue is fixed in version 1.11.2.","state":0,"publishedAt":"2026-10-06T19:52:37.818+00:00","modifiedAt":"2026-10-07T10:45:18.01+00:00","affected":[{"ecosystem":"Vendor product","name":"lz4-java","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"yawkat\",\n                    \"product\": \"lz4-java\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.11.2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/yawkat/lz4-java/security/advisories/GHSA-4v53-57pg-c464","https://github.com/yawkat/lz4-java/commit/bb83dd16163cdb71231af06b0a5651881148a634","https://github.com/yawkat/lz4-java/releases/tag/v1.11.2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-106452","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-106452","identifiers":["CVE-2026-106452"]},"retained":false,"historicalAffected":[]}],"coverage":[]}