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CVE-2026-63266

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

CVSS 4.0 6.8 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-63266

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-63266

Published

LibreOffice

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "The Document Foundation",
                    "product": "LibreOffice",
                    "defaultStatus": "unknown",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "26.2",
                            "lessThan": "< 26.2.5",
                            "versionType": "26.2 series"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON