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LibreOffice CVE-2026-4430

| EUVD-2026-28327 MEDIUM
Out-of-bounds Write (CWE-787)
2026-05-07 Document Fdn. GHSA-cwgp-8p97-cf77
5.4
CVSS 4.0
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CVSS VectorNVD

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
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
P
Scope
X

Lifecycle Timeline

5
Analysis Generated
May 07, 2026 - 10:00 vuln.today
Patch available
May 07, 2026 - 09:01 EUVD
CVSS changed
May 07, 2026 - 08:22 NVD
5.4 (MEDIUM)
CVE Published
May 07, 2026 - 07:16 nvd
UNKNOWN (no severity yet)
CVE Published
May 07, 2026 - 07:16 nvd
MEDIUM 5.4

DescriptionNVD

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.

AnalysisAI

Out-of-bounds write in LibreOffice 26.2 before 26.2.3 and 25.8 before 25.8.7 allows local attackers to cause memory corruption and availability impact by opening crafted OOXML documents with mismatched encryption salt parameters. The vulnerability requires user interaction to open a malicious document and affects memory integrity with elevated scope impact on availability.

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Vendor StatusVendor

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CVE-2026-4430 vulnerability details – vuln.today

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