{"id":"CVE-2026-106453","published":"2026-10-06T20:17:27.457","lastModified":"2026-10-07T17:16:48.007","description":"yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.2, LZ4DecompressorWithLength uses getDecompressedLength to trust the four-byte decompressed-length header before validating the compressed input, allowing a five-byte attacker-supplied input whose header declares a large output size to request up to approximately 2 GiB and exhaust the JVM heap. Convenience overloads backed by LZ4FastDecompressor or LZ4SafeDecompressor allocate the untrusted size, while overloads that write to a caller-provided destination buffer are not affected because the caller controls the destination size. This issue is fixed in version 1.11.2.","cvssScore":5.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cwes":["CWE-789"],"vendors":[],"products":[],"references":[{"url":"https://github.com/yawkat/lz4-java/commit/6492ce5aca6bd03ff9e08ee18a2beb94c431371a","tags":[]},{"url":"https://github.com/yawkat/lz4-java/releases/tag/v1.11.2","tags":[]},{"url":"https://github.com/yawkat/lz4-java/security/advisories/GHSA-6cx8-rjf8-pr8g","tags":[]}],"exploitRefs":[{"url":"https://github.com/yawkat/lz4-java/commit/6492ce5aca6bd03ff9e08ee18a2beb94c431371a","tags":[]},{"url":"https://github.com/yawkat/lz4-java/releases/tag/v1.11.2","tags":[]},{"url":"https://github.com/yawkat/lz4-java/security/advisories/GHSA-6cx8-rjf8-pr8g","tags":[]}],"hasPoc":true,"ai":null}