{"id":"CVE-2026-106450","revision":"d1f0cd75d73d4464afebd7fdcc767a70","records":[{"revision":"d1f0cd75d73d4464afebd7fdcc767a70","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-106450","aliases":[],"title":"yawkat LZ4 Java: LZ4FrameInputStream reallocates block buffers for every frame, allowing CPU and GC amplification from small inputs","description":"yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.4, net.jpountz.lz4.LZ4FrameInputStream readHeader() allocates two new 4 MiB block buffers whenever a maximum-block-size frame header is read, and the default concatenated-frame mode allows attacker-controlled streams containing many minimal empty frames to trigger roughly 8 MiB of allocation for every 11 input bytes. The stream produces no decompressed output while consuming CPU and garbage-collection time, so decompressed-size limits do not mitigate the issue; readSingleFrame mode is not affected. This issue is fixed in version 1.11.4.","state":0,"publishedAt":"2026-10-06T19:48:40.092+00:00","modifiedAt":"2026-10-09T01:44:37.343+00:00","affected":[{"ecosystem":"Vendor product","name":"lz4-java","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"yawkat\",\n                    \"product\": \"lz4-java\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.11.4\",\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-gm45-99xc-r7wv","https://github.com/yawkat/lz4-java/commit/2acc0ec1ead226145c62a817c18c8ed49233a283","https://github.com/yawkat/lz4-java/releases/tag/v1.11.4"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-106450","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-106450","identifiers":["CVE-2026-106450"]},"retained":false,"historicalAffected":[]}],"coverage":[]}