CVE-2026-4430

EUVD-2026-28327
Out-of-bounds write vulnerability in The Document Foundation LibreOffice via crafted OOXML documents with mismatched encryption salt parameters.

This issue affects LibreOffice: from 26.2 before 26.2.3, from 25.8 before 25.8.7.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.8 HIGH
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Affected Products (NVD)
VendorProductVersion
libreofficelibreoffice
25.8.0.0 ≤
𝑥
< 25.8.7.0
libreofficelibreoffice
26.2.0.0 ≤
𝑥
< 26.2.3.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
libreoffice
bookworm
vulnerable
bookworm (security)
4:7.4.7-1+deb12u11
fixed
bullseye
vulnerable
bullseye (security)
vulnerable
forky
4:26.2.3.2-2
fixed
sid
4:26.2.3.2-2
fixed
trixie
vulnerable
trixie (security)
4:25.2.3-2+deb13u4
fixed
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://www.libreoffice.org/about-us/security/advisories/cve-2026-4430