CVE-2026-63273CWE-787

CVE-2026-63273

published September 22, 2026

CVSS
5.4
EPSS
0%
Percentile
1.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
5.4 · NONE
CVSS v4.0
5.4 · CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P
EPSS
0.00120 · 1.8th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-09-22T16:17Z
References (1)
EPSS history
Timeline
  • 24 SEP 03:24Z
    EPSS moved — → 0%
    epss
  • 22 SEP 11:10Z
    Heap buffer overflow in PDF import encryption handling
    cvelistv5