CVE-2026-8357

MEDIUM

The Document Foundation LibreOffice - Heap Buffer Overflow in Calc Formula Compilation

Title source: rule

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.

References (1)

Core 1

Core References

https://www.libreoffice.org/about-us/security/advisories/cve-2026-8357

Scores

CVSS v4 5.4

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-193 CWE-787

Status published

Products (1)

The Document Foundation/LibreOffice 26.2 - < 26.2.4

Published Jun 15, 2026

Tracked Since Jun 15, 2026