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Vulnerabilities CVE-2026-8357

CVE-2026-8357

Medium
Open
TLP:CLEAR

Heap buffer overflow in Calc formula compilation

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Description

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.

Details

CVSS Score
5.4
EPSS Score
0.16%

5.3th percentile

CVSS Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P
Confidence
90%
Published
Jun 15, 2026
Last Modified
Jul 28, 2026
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