---
id: CVE-2026-76181
title: Heap buffer overflow in dBASE index import
summary: >-
  LibreOffice includes a dBASE database driver, which reads dBASE tables and
  their .ndx index files when a folder of dBASE files is used as a data source.
  A heap buffer overflow existed when an index page was read. The number of
  entries re…
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-674
vendor: The Document Foundation
product: LibreOffice
affected:
  - LibreOffice >= 26.2 < < 26.2.6
  - LibreOffice >= 26.8 < < 26.8.1
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T20:19:33.387362Z'
published: '2026-11-05'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T20:19:49.628Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-76181'
references:
  - url: 'https://www.libreoffice.org/about-us/security/advisories/cve-2026-76181'
tags:
  - cve.org
ingestedAt: '2026-11-05T22:38:31.732Z'
---

## Overview

LibreOffice includes a dBASE database driver, which reads dBASE tables and their .ndx index files when a folder of dBASE files is used as a data source. A heap buffer overflow existed when an index page was read. The number of entries recorded in a page was not checked against the number of entries the page could hold, which comes from a different field of the index header. A crafted index could also make a page refer back to itself, so that reading it recursed without end. In fixed versions the index header and the entry count of each page are limited to what an index page can hold, and a page that refers back to one of its parent pages is not followed.

## Affected

- `LibreOffice >= 26.2 < < 26.2.6`
- `LibreOffice >= 26.8 < < 26.8.1`

## Remediation

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