{"id":"JLSEC-2026-462","details":"XZ Utils provide a general-purpose data-compression library plus command-line tools. Prior to version 5.8.3, if lzma_index_decoder() was used to decode an Index that contained no Records, the resulting lzma_index was left in a state where where a subsequent lzma_index_append() would allocate too little memory, and a buffer overflow would occur. This issue has been patched in version 5.8.3.","modified":"2026-05-07T15:15:06.175113Z","published":"2026-05-07T15:03:46.925Z","upstream":["CVE-2026-34743"],"database_specific":{"license":"CC-BY-4.0","sources":[{"url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-34743","published":"2026-04-02T19:21:33.187Z","id":"CVE-2026-34743","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34743","database_specific":{"status":"Analyzed"},"modified":"2026-04-15T17:33:17.680Z","imported":"2026-05-07T14:30:18.361Z"}]},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/03/31/13"},{"type":"WEB","url":"https://github.com/tukaani-project/xz/commit/c8c22869e780ff57c96b46939c3d79ff99395f87"},{"type":"WEB","url":"https://github.com/tukaani-project/xz/releases/tag/v5.8.3"},{"type":"WEB","url":"https://github.com/tukaani-project/xz/security/advisories/GHSA-x872-m794-cxhv"}],"affected":[{"package":{"name":"XZ_jll","ecosystem":"Julia","purl":"pkg:julia/XZ_jll?uuid=ffd25f8a-64ca-5728-b0f7-c24cf3aae800"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"5.8.3+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-462.json"}}],"schema_version":"1.7.5"}