{"id":"CVE-2026-26824","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-26824","generatedAt":"2026-10-28T03:31:49.978Z","title":"libxls through version 1.6.3 contains a use of uninitialized memory vulnerability in the OLE container parser.","description":"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","published":"2026-06-03T20:16:19.000Z","lastModified":"2026-09-23T16:16:42.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L"},"cwe":["CWE-457"],"affected":["libxls project/libxls"],"epss":{"score":0.0027,"percentile":0.19072,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.27%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/libxls/libxls/commit/9adebc9b6d60db21f25ddc898e8760eeb69d6529","source":"cve@mitre.org"},{"url":"https://github.com/libxls/libxls/issues/153","source":"cve@mitre.org"},{"url":"https://github.com/libxls/libxls/issues/155","tags":["Exploit","Issue Tracking"],"source":"cve@mitre.org"},{"url":"https://github.com/libxls/libxls/issues/155","tags":["Exploit","Issue Tracking"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-26824","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}