CVE-2026-6047
Heap buffer overflow in OOXML text box element import
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-787 CWE-843 |
| Vendor | the document foundation |
| Product | libreoffice |
| Published | Jun 15, 2026 |
| Last Updated | Jun 15, 2026 |
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Affected Versions
The Document Foundation / LibreOffice
25.8 < < 25.8.7 26.2 < < 26.2.3
References
Credits
Anthropic (automated discovery using Claude) Trail of Bits (triage and validation)