High severity · published May 7, 2026
CVE-2026-4430
Heap Buffer Overflow in AgileEngine
7.8
CVSS
0.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 0% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
LibreOffice · The Document Foundation
26.2 before 26.2.3; 25.8 before 25.8.7 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4430
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4430
Vendor Advisory
https://www.libreoffice.org/about-us/security/advisories/cve-2026-4430
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