CVE-2026-4430
High
Description
Out-of-bounds write vulnerability in The Document Foundation LibreOffice via crafted OOXML documents with mismatched encryption salt parameters. This issue affects LibreOffice: from 26.2 before 26.2.3, from 25.8 before 25.8.7.
SeverityHigh
CVSS7.8
Exploit probability—
ProductLibreoffice
PublishedMay 7, 2026
First seenMay 7, 2026
Weakness typeCWE-787Out-of-bounds write
How to fix
Update
- libreoffice libreoffice25.8.7.0, 26.2.3.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| libreoffice libreoffice | 25.8.0.0 ≤ v < 25.8.7.0, 26.2.0.0 ≤ v < 26.2.3.0 | 25.8.7.0, 26.2.3.0 |
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