CVE-2026-6047
Medium
Description
LibreOffice can import documents in the OOXML format (DOCX). A heap buffer overflow existed when replaying deferred parser events for a text box element. A handler object was assumed to be of one type and written to at that type's field layout, but it could be a smaller object, so the write landed past the end of the allocation. In fixed versions the type is checked before the write.
SeverityMedium
CVSS5.4
Exploit probability—
ProductLibreOffice
PublishedJun 15, 2026
First seenJun 15, 2026
Weakness typeCWE-787Out-of-bounds writeCWE-843CWE-843
How to fix
Update
- The Document Foundation LibreOffice< 25.8.7, < 26.2.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| The Document Foundation LibreOffice | 25.8 ≤ v < < 25.8.7, 26.2 ≤ v < < 26.2.3 | < 25.8.7, < 26.2.3 |
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