{"id":"JLSEC-2026-1301","details":"libxls through version 1.6.3 contains a use of uninitialized memory vulnerability in the OLE container parser. Memory allocated for the Master Sector Allocation Table (MSAT) in `read_MSAT()` is not fully initialized before being consumed by `ole2_validate_sector_chain()`, which may result in application crashes or potential information disclosure when processing a crafted XLS file","modified":"2026-08-13T11:00:03.421298991Z","published":"2026-08-13T10:57:26.913Z","upstream":["CVE-2026-26824"],"database_specific":{"license":"CC-BY-4.0","sources":[{"database_specific":{"status":"Analyzed"},"id":"CVE-2026-26824","imported":"2026-08-12T16:06:13.499Z","modified":"2026-07-22T20:10:00.127Z","published":"2026-06-03T20:16:18.677Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-26824","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26824"}]},"references":[{"type":"WEB","url":"https://github.com/libxls/libxls/issues/155"},{"type":"WEB","url":"https://github.com/libxls/libxls/issues/155"}],"affected":[{"package":{"name":"libxls_jll","ecosystem":"Julia","purl":"pkg:julia/libxls_jll?uuid=86717fa1-76ed-5f2d-aba0-009d7207923f"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1301.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L"}]}