{"id":"CVE-2026-26824","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":"2026-07-08T08:12:41.204121353Z","published":"2026-06-03T00:00:00Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26824.json","cna_assigner":"mitre"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26824.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26824"},{"type":"REPORT","url":"https://github.com/libxls/libxls/issues/155"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/libxls/libxls","events":[{"introduced":"0"},{"fixed":"c199d132494833da696b58aa4acf3fc5a36d930b"}],"database_specific":{"source":["DESCRIPTION","CPE_RANGE"],"extracted_events":[{"introduced":"0"},{"fixed":"1.6.3"},{"last_affected":"1.6.3"}],"cpe":"cpe:2.3:a:libxls_project:libxls:*:*:*:*:*:*:*:*"}}],"versions":["v1.6.2","v1.6.2-rc0","v1.6.1","v1.6.0","v1.6.0-rc0","v1.5.3","v1.5.3-rc0","v1.5.2","v1.5.2-rc0","v1.5.1","v1.5.1-rc1","v1.5.1-rc0","v1.5.0","v1.5.0-rc4","v1.5.0-rc3","v1.5.0-rc2","v1.5.0-rc1","v1.5.0-rc0","v1.4.0","v1.3.4","v1.3.3","v1.3.2","v1.3.1","v1.3.0","v1.2.1","v1.2.0","v1.1.0","v1.0.0","v0.3.0","v0.2.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26824.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:L/I:N/A:L"}]}