CVE-2026-8357

Name: CVE-2026-8357
Creator: NVD / NIST
Published: 2026-06-15T18:16:37.513+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.12%

Last modified Jun 17, 2026

CVE-2026-8357 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 0.12% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 4.0

5.4/10

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

EPSS Probability

0.12%

2.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

References

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

Timeline

Published: Jun 15, 2026
Last Modified: Jun 17, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2026-8357?

How severe is CVE-2026-8357?

CVE-2026-8357 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.12% probability of exploitation in the next 30 days.

How do I fix CVE-2026-8357?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-8357?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST