{"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":"2026-07-25T18:24:29.385018558Z","published":"2026-05-07T15:03:46.925Z","upstream":["CVE-2026-34743"],"database_specific":{"sources":[{"modified":"2026-06-17T10:39:32.747Z","published":"2026-04-02T19:21:33.187Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-34743","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34743","database_specific":{"status":"Analyzed"},"id":"CVE-2026-34743","imported":"2026-07-17T21:56:37.321Z"}],"license":"CC-BY-4.0"},"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","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}