---
id: CVE-2026-63278
title: >-
  URLs could be constructed which expanded environment variable or INI file
  values, so potentially sensitive information could be exfiltrated to a remote
  server on opening a document containing such links
summary: >-
  URLs could be constructed which expanded environment variable or INI file
  values, so potentially sensitive information could be exfiltrated to a remote
  server on opening a document containing such links. The check added for
  CVE-2024-1242…
severity: medium
cvss: 6.7
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N'
cwe:
  - CWE-200
vendor: The Document Foundation
product: LibreOffice
affected:
  - LibreOffice >= 26.2 < < 26.2.5
published: '2026-09-22'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T19:09:32.273'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63278'
references:
  - url: 'https://www.libreoffice.org/about-us/security/advisories/cve-2026-63278'
    label: security@documentfoundation.org
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-22T12:17:14.275864Z'
cvssSource: cna
ingestedAt: '2026-09-22T12:03:01.596Z'
epss: 0.0015
epssPercentile: 0.03482
---

## Overview

URLs could be constructed which expanded environment variable or INI file values, so potentially sensitive information could be exfiltrated to a remote server on opening a document containing such links. The check added for CVE-2024-12426 did not recognise every way of naming the package content provider, so a URL that named it differently still reached the expansion. In fixed versions the package content provider is matched when the URL is checked.

## Remediation

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