CVE-2026-63274
Medium
Description
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.
SeverityMedium
CVSS5.4
Exploit probability—
ProductLibreOffice
PublishedSep 22, 2026
First seenSep 22, 2026
Weakness typeCWE-787Out-of-bounds writeCWE-125Out-of-bounds read
How to fix
Update
- The Document Foundation LibreOffice< 26.2.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| The Document Foundation LibreOffice | 26.2 ≤ v < < 26.2.5 | < 26.2.5 |
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