Vulnerability in The Document Foundation LibreOffice

[ Description ]Official description

URLs could be constructed which expanded environment variable or INI file values, so potentially sensitive information could be exfiltrated to a remote server on opening a document containing such links. The check added for CVE-2024-12426 did not cover every place a document can supply a URL. XForms instance data and the Calc csv and sql data providers still reached the expansion. In fixed versions these places refuse URLs with internal schemes when the URL comes from the document.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund5 Oct 2026WID-SEC-2026-3738

  LibreOffice: Multiple vulnerabilities Translated from German

  Risk highCVE-2026-63277CVE-2026-63266CVE-2026-63270+3 more CVEs

[ References ]References

• www.libreoffice.org/about-us/security/advisories/cve-2026-63270