CVE-2026-63270

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.

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.

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.

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.

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.

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.

Arbitrary file write via calcext:data-mappings, sql provider and Firebird backup functionality. (CVE-2026-63266) LFI and GET SSRF via calcext:data-mappings and csv provider. (CVE-2026-63267) LFI via calcext:data-mappings, sql provider and sdbc:flat:file:// db href. (CVE-2026-63268) LFI and GET SSRF via GStreamer and HLS playlists. (CVE-2026-63269) Environment/ini-file leaks. (CVE-2026-63270) Heap buffer overflow in WMF text record import. (CVE-2026-63272) Heap buffer overflow in PDF import encryption handling. (CVE-2026-63273) Heap buffer overflow in PDF import stream handling. (CVE-2026-63274) Stack buffer overflow in CFF font hint handling. (CVE-2026-63275) Stack buffer overflow in CFF to Type 1 font conversion. (CVE-2026-63276) RCE via calcext:data-mappings, sql provider and jdbc connector. (CVE-2026-63277) Package URLs can be used to exfiltrate arbitrary INI file values and environment variables. (CVE-2026-63278) Out of bounds read in PICT image import. (CVE-2026-63279)