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OpenAdvisories
Medium · 6.8 CVE-2026-63266 EUVD-2026-92417GHSA-5436-5r9x-m4jv

Arbitrary file write via calcext:data-mappings, sql provider and Firebird backup functionality

Published Oct 5, 2026 · Updated Oct 5, 2026 · Assigned by Document Fdn.

Description

LibreOffice Calc can link a cell range to an external data source, and the link is saved in the document. Through such a link a document could open an embedded Firebird database that wrote a file to any location the user could write to. In fixed versions an embedded Firebird database can open or create files only inside its own private directory.

Affected products

VendorProductAffectedFixed
The Document Foundation LibreOffice 26.2 – < < 26.2.5 < 26.2.5

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 libreoffice 4:26.2.5.2-1 —
Debian 13 libreoffice 4:25.2.3-2+deb13u8 —
Debian 12 libreoffice No fix yet —
ReleasePackageFixed inAdvisory
Ubuntu 26.10 libreoffice No fix yet —
Ubuntu 26.04 LTS libreoffice No fix yet —
Ubuntu 24.04 LTS libreoffice No fix yet —
Ubuntu 22.04 LTS libreoffice No fix yet —
Ubuntu 20.04 LTS libreoffice No fix yet —

Advisories 1

References