PT-2026-49266 · Document Foundation · Libreoffice

Anthropic + 1 · Published 2026-06-15 · Updated 2026-06-15 · CVE-2026-8356

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 (affected versions not specified)

Description A stack buffer overflow occurs when importing presentations in the legacy binary PPT format. The issue arises during the import of a colour-replacement record where two fixed-size colour tables are filled from the file. Because the write position is not reset between the two passes over the record, a file with combined colour counts exceeding the table size writes past the end of the tables on the stack.

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

Memory Corruption

Stack Overflow

Weakness Enumeration

CWE-787

CWE-121

Related Identifiers

CVE-2026-8356

Affected Products

Libreoffice

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-8356 · Security Note
• https://twitter.com/VulmonFeeds/status/2066595343987359845 · Twitter Post
• https://t.me/CVEtracker/56879 · Telegram Post
• https://libreoffice.org/about-us/security/advisories/cve-2026-8356 · Note