CVE-2026-8357
Heap buffer overflow in Calc formula compilation
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
LibreOffice Calc compiles cell formulas when opening a spreadsheet. A heap buffer overflow existed when compiling a very long formula made up of many opening tokens. The array that tracks nesting depth was allocated one element too small for that worst case, so such a formula wrote one element past its end. In fixed versions the array is sized to hold the largest possible nesting.
| CWE | CWE-787 CWE-193 |
| 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
26.2 < < 26.2.4
References
Credits
Anthropic (automated discovery using Claude) Arthur Chan of Ada Logics (validation and reporting)