PT-2026-49263 · Document Foundation · Libreoffice

Anthropic + 1 · Published 2026-06-15 · Updated 2026-06-15 · CVE-2026-6040

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 The product name cannot be determined (affected versions not specified)

Description A heap use-after-free occurs during the import of blank-width characters within an ODF number format. This happens because a position value read from the document is not validated against the length of the format-code string, allowing a malformed number format to be processed against memory outside the intended string boundaries. Heap use-after-free is a memory corruption issue where a program continues to use a pointer after the memory it points to has been freed.

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

Memory Corruption

Use After Free

Weakness Enumeration

CWE-787

CWE-416

Related Identifiers

CVE-2026-6040

Affected Products

Libreoffice

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-6040 · Security Note
• https://t.me/CVEtracker/56876 · Telegram Post
• https://libreoffice.org/about-us/security/advisories/cve-2026-6040 · Note