---
id: CVE-2026-6045
title: Heap buffer overflow in EMF+ gradient brush import
summary: >-
  LibreOffice can import EMF+ graphics, which may be embedded in documents. A
  heap buffer overflow existed when importing an EMF+ gradient brush. The number
  of gradient blend points was read from the file and used to compute an
  allocation …
severity: medium
cvss: 5.4
cvssVector: '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'
cvssSource: cna
cwe:
  - CWE-787
  - CWE-190
vendor: The Document Foundation
product: LibreOffice
affected:
  - LibreOffice >= 25.8 < < 25.8.7
  - LibreOffice >= 26.2 < < 26.2.3
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-06-15T18:12:50.303654Z'
published: '2026-06-15'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T14:22:54.255Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-6045'
references:
  - url: 'https://www.libreoffice.org/about-us/security/advisories/cve-2026-6045'
tags:
  - cve.org
epss: 0.00167
epssPercentile: 0.05353
ingestedAt: '2026-09-28T15:13:31.605Z'
---

## Overview

LibreOffice can import EMF+ graphics, which may be embedded in documents. A heap buffer overflow existed when importing an EMF+ gradient brush. The number of gradient blend points was read from the file and used to compute an allocation size, but that multiplication could overflow, so a small buffer was allocated and then filled as if it were large, writing past its end. In fixed versions the blend-point count is checked against the data actually available before allocating.

## Affected

- `LibreOffice >= 25.8 < < 25.8.7`
- `LibreOffice >= 26.2 < < 26.2.3`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.