All vulnerabilities
CVE-2026-63266

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

The Document Foundation LibreOffice
Open in ThreatlineRecord JSON
CVSS
6.8Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.16%Chance of exploitation activity in the next 30 days, higher than 4% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published5 Oct 2026Updated 5 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

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.

Text from CVE List

Affected versions 1

  • LibreOfficeaffected: 26.2 before < 26.2.5CVE List

References 1