PT-2026-38345 · Document Foundation · Libreoffice

Danzation + 1 · Published 2026-05-06 · Updated 2026-05-15 · CVE-2026-4430

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions LibreOffice versions 26.2 through 26.2.2 LibreOffice versions 25.8 through 25.8.6

Description An out-of-bounds write occurs when processing crafted OOXML documents that contain mismatched encryption salt parameters. An out-of-bounds write is a memory corruption issue where data is written outside the intended boundary of a buffer, potentially leading to crashes or arbitrary code execution.

Recommendations Update LibreOffice versions 26.2 through 26.2.2 to version 26.2.3. Update LibreOffice versions 25.8 through 25.8.6 to version 25.8.7.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

BDU:2026-06581

CVE-2026-4430

ECHO-C13C-F4B9-2ECE

Affected Products

Libreoffice

References · 14

• https://osv.dev/vulnerability/UBUNTU-CVE-2026-4430 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-4430 · Vendor Advisory
• https://libreoffice.org/about-us/security/advisories/cve-2026-4430 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-4430 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-4430 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-06581 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-4430 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-4430 · Security Note
• https://t.me/cveNotify/162757 · Telegram Post
• https://t.me/CVEtracker/52958 · Telegram Post
• https://twitter.com/CVEnew/status/2052400802241884229 · Twitter Post
• https://twitter.com/Cezar_H_Linux/status/2055382426860269880 · Twitter Post
• https://libreoffice.org/security/#cve-2026-4430 · Note
• https://git.libreoffice.org/core/+/1ec3db717fa144ddff3e9b0a2338a82355cf365b · Note