{"cve":"CVE-2026-106450","nvd":{"published":"2026-10-06T20:17:27.037","modified":"2026-10-09T02:16:59.843","status":"Awaiting Analysis","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.","cvss_v4":null,"cvss_v3":{"version":"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},"cwes":["CWE-770"],"references":["https://github.com/yawkat/lz4-java/commit/2acc0ec1ead226145c62a817c18c8ed49233a283","https://github.com/yawkat/lz4-java/releases/tag/v1.11.4","https://github.com/yawkat/lz4-java/security/advisories/GHSA-gm45-99xc-r7wv"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:58:01.639778232+00:00"},"epss":{"cve":"CVE-2026-106450","score":0.00454,"percentile":0.39144,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-gm45-99xc-r7wv","url":"https://osv.dev/vulnerability/GHSA-gm45-99xc-r7wv","summary":"yawkat LZ4 Java: LZ4FrameInputStream reallocates block buffers for every frame, allowing CPU and GC amplification from small inputs","modified":"2026-10-07T20:45:05.906321924Z","packages":[{"ecosystem":"Maven","name":"at.yawk.lz4:lz4-java","purl":"pkg:maven/at.yawk.lz4/lz4-java","ranges":["<1.11.4"],"fixed":["1.11.4"]},{"ecosystem":"Maven","name":"org.lz4:lz4-java","purl":"pkg:maven/org.lz4/lz4-java","ranges":["<=1.8.1"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}