CVE-2026-8358
Medium
Description
LibreOffice Calc can import tracked changes from a spreadsheet document. A heap buffer overflow existed when a document reused the same change identifier for two different kinds of change. The importer then treated one change object as a different, larger type and wrote past the end of its allocation. In fixed versions records with a duplicate identifier are rejected.
SeverityMedium
CVSS5.4
Exploit probability—
ProductLibreOffice
PublishedJun 15, 2026
First seenJun 15, 2026
Weakness typeCWE-843CWE-843CWE-787Out-of-bounds write
How to fix
Update
- The Document Foundation LibreOffice< 25.8.7, < 26.2.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| The Document Foundation LibreOffice | 25.8 ≤ v < < 25.8.7, 26.2 ≤ v < < 26.2.4 | < 25.8.7, < 26.2.4 |
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