PT-2026-49267 · Document Foundation · Libreoffice

Anthropic + 1 · Published 2026-06-15 · Updated 2026-06-15 · CVE-2026-8357

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions LibreOffice Calc (affected versions not specified)

Description A heap buffer overflow occurs during the compilation of cell formulas when opening a spreadsheet. This issue is triggered by very long formulas containing numerous opening tokens. The array used to track nesting depth is allocated with one element too few for the worst-case scenario, causing the formula to write one element beyond the array boundary.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Corruption

Weakness Enumeration

CWE-787

CWE-193

Related Identifiers

CVE-2026-8357

Affected Products

Libreoffice

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-8357 · Security Note
• https://twitter.com/VulmonFeeds/status/2066592784342016319 · Twitter Post
• https://t.me/CVEtracker/56880 · Telegram Post
• https://libreoffice.org/about-us/security/advisories/cve-2026-8357 · Note