{"id":"CVE-2026-3663","summary":"xlnt-community xlnt XLSX File compound_document.cpp xsgetn out-of-bounds","details":"A vulnerability was found in xlnt-community xlnt up to 1.6.1. This issue affects the function xlnt::detail::compound_document_istreambuf::xsgetn of the file source/detail/cryptography/compound_document.cpp of the component XLSX File Parser. Performing a manipulation results in out-of-bounds read. The attack is only possible with local access. The exploit has been made public and could be used. The patch is named 147. It is recommended to apply a patch to fix this issue.","modified":"2026-08-12T03:51:16.313981547Z","published":"2026-03-07T14:32:09.897Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3663.json","cna_assigner":"VulDB","cwe_ids":["CWE-119","CWE-125"]},"references":[{"type":"WEB","url":"https://github.com/xlnt-community/xlnt/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3663.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3663"},{"type":"ADVISORY","url":"https://vuldb.com/?id.349552"},{"type":"ADVISORY","url":"https://vuldb.com/?submit.764644"},{"type":"REPORT","url":"https://github.com/xlnt-community/xlnt/issues/139"},{"type":"REPORT","url":"https://vuldb.com/?ctiid.349552"},{"type":"FIX","url":"https://github.com/xlnt-community/xlnt/pull/147"},{"type":"EVIDENCE","url":"https://github.com/oneafter/0128/blob/main/xl3/repro"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/xlnt-community/xlnt","events":[{"introduced":"8b28e662cbd9e6c2ff3e020a8a163564cbc48e42"},{"last_affected":"3b25b084eab473bb6009b8e3d03ba5ff10bb4891"}],"database_specific":{"cpe":"cpe:2.3:a:xlnt-community:xlnt:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"1.6.0"},{"last_affected":"1.6.0"},{"introduced":"1.6.1"},{"last_affected":"1.6.1"},{"introduced":"0"}],"source":["AFFECTED_FIELD","CPE_RANGE"]}}],"versions":["1.6.0","1.6.1","v1.6.1","v1.6.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3663.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"}]}