CVE-2026-63266

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

State: Published
Severity: 6.8 Medium
Published: Oct 5, 2026
Updated: Oct 5, 2026
Reserved: Jul 16, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.8 Medium	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N	Document Fdn.

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected Products

Product	Versions
LibreOfficeThe Document Foundation	26.2 to before < 26.2.5Affected

References

https://www.libreoffice.org/about-us/security/advisories/cve-2026-63266

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