CVE-2026-8357

medium

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

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

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8357.json

https://bugzilla.redhat.com/show_bug.cgi?id=2488964

https://access.redhat.com/security/cve/CVE-2026-8357

https://access.redhat.com/errata/RHSA-2026:36832

https://access.redhat.com/errata/RHSA-2026:35839

Details

Source: Mitre, NVD

Published: 2026-06-15

Updated: 2026-07-09

Risk Information

CVSS v2

Base Score: 7.2

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Severity: High

CVSS v4

Base Score: 6.9

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

Severity: Medium

EPSS

EPSS: 0.00119