CVE-2026-63267: The Document Foundation Libreoffice

Medium severity, CVSS 6.7. EPSS: 0.1% chance of exploitation in the next 30 days.

LibreOffice Calc can link a cell range to an external csv data source, and the link is saved in the document. Such a link was fetched while the document loaded, so opening a document could read a local file into the sheet, or make a request to a host of the document's choosing. In fixed versions external data links are updated under the same link update control as other links in a spreadsheet.

Affected products

• The Document Foundation Libreoffice: from 26.2, before 26.2.5 (fixed in 26.2.5)

Published 2026-10-05. Last modified 2026-10-06.