CVE-2026-63274CWE-125CWE-787

CVE-2026-63274

published September 22, 2026

CVSS
5.4
EPSS
0%
Percentile
7.9
In the wild
Unconfirmed
What it is

LibreOffice Draw can import PDF documents. A heap buffer overflow existed when importing a stream object. The length of the stream was taken from the object's own dictionary and was not checked against the number of bytes actually present, so copying the stream read and wrote past the end of the buffer holding it. In fixed versions the declared length is clamped to the bytes actually read.

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
0.00187 · 7.9th percentile
Weaknesses
CWE-125 · Out-of-bounds Read; 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 stream handling
    cvelistv5