CVE-2026-63273

LibreOffice Draw can import PDF documents. A heap buffer overflow existed when importing an encrypted document. The length of the decryption key was taken from the document's own encryption dictionary and was used to fill a fixed size key buffer without being checked against it, so a length larger than that buffer wrote past its end. In fixed versions a declared key length larger than the buffer is rejected.

LibreOffice Draw can import PDF documents. A heap buffer overflow existed when importing an encrypted document. The length of the decryption key was taken from the document's own encryption dictionary and was used to fill a fixed size key buffer without being checked against it, so a length larger than that buffer wrote past its end. In fixed versions a declared key length larger than the buffer is rejected.

LibreOffice Draw can import PDF documents. A heap buffer overflow existed when importing an encrypted document. The length of the decryption key was taken from the document's own encryption dictionary and was used to fill a fixed size key buffer without being checked against it, so a length larger than that buffer wrote past its end. In fixed versions a declared key length larger than the buffer is rejected.

LibreOffice Draw can import PDF documents. A heap buffer overflow existed when importing an encrypted document. The length of the decryption key was taken from the document's own encryption dictionary and was used to fill a fixed size key buffer without being checked against it, so a length larger than that buffer wrote past its end. In fixed versions a declared key length larger than the buffer is rejected.

LibreOffice Draw can import PDF documents. A heap buffer overflow existed when importing an encrypted document. The length of the decryption key was taken from the document's own encryption dictionary and was used to fill a fixed size key buffer without being checked against it, so a length larger than that buffer wrote past its end. In fixed versions a declared key length larger than the buffer is rejected.

LibreOffice Draw can import PDF documents. A heap buffer overflow existed when importing an encrypted document. The length of the decryption key was taken from the document's own encryption dictionary and was used to fill a fixed size key buffer without being checked against it, so a length larger than that buffer wrote past its end. In fixed versions a declared key length larger than the buffer is rejected.

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)

It was discovered that LibreOffice incorrectly handled WMF image imports. An attacker could possibly use this issue to cause LibreOffice to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2026-63272)

It was discovered that LibreOffice incorrectly handled PDF document imports. An attacker could possibly use this issue to cause LibreOffice to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2026-63273, CVE-2026-63274)

It was discovered that LibreOffice incorrectly handled CFF fonts embedded in documents. An attacker could possibly use this issue to cause LibreOffice to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2026-63275, CVE-2026-63276)

It was discovered that LibreOffice incorrectly validated package URLs. An attacker could possibly use this issue to obtain sensitive information. (CVE-2026-63278)

It was discovered that LibreOffice incorrectly handled PICT image imports. An attacker could possibly use this issue to cause LibreOffice to crash, resulting in a denial of service, or obtain sensitive information. (CVE-2026-63279)

It was discovered that LibreOffice incorrectly mitigated out-of-bounds writes via Graphite font actions. An attacker could possibly use this issue to cause LibreOffice to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2026-50593)