---
id: CVE-2026-63277
title: >-
  LibreOffice Calc can link a cell range to an external data source, and the
  link is saved in the document
summary: >-
  LibreOffice Calc can link a cell range to an external data source, and the
  link is saved in the document. A document could name a Java database driver
  for such a link to be loaded from a remote location, so opening the document
  could run…
severity: high
cvss: 8.5
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-829
vendor: The Document Foundation
product: LibreOffice
affected:
  - LibreOffice >= 26.2 < < 26.2.5
published: '2026-10-05'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T15:03:59.427'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63277'
references:
  - url: 'https://www.libreoffice.org/about-us/security/advisories/cve-2026-63277'
    label: security@documentfoundation.org
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63277.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-63277'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2545885'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-63277'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63277'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - exploit-available
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-05T12:43:08.481980Z'
cvssSource: cna
scores:
  cna: 8.5
  vendor: 7.8
ingestedAt: '2026-10-05T12:19:22.673Z'
epss: 0.0034
epssPercentile: 0.27334
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/HORKimhab/CVE-2026-63277'
  checkedAt: '2026-10-27T19:06:41.944Z'
exploitAvailable: true
---

## Overview

LibreOffice Calc can link a cell range to an external data source, and the link is saved in the document. A document could name a Java database driver for such a link to be loaded from a remote location, so opening the document could run Java code from that location. In fixed versions an entry in a Java class path has to be a file URL.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-05 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63277.json)