Vulnerability · Published Oct 5, 2026 · Assigned by Document Fdn.
CVE-2026-63270Environment/ini-file leaks
Medium 6.7
In plain English
A medium-severity information exposure in LibreOffice from The Document Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 cover every place a document can supply a URL. XForms instance data and the Calc csv and sql data providers still reached the expansion. In fixed versions these places refuse URLs with internal schemes when the URL comes from the document.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libreoffice | no fix listed | DEBIAN-CVE-2026-63270 |
| Debian:13 | libreoffice | 4:25.2.3-2+deb13u8 | DEBIAN-CVE-2026-63270 |
| Debian:14 | libreoffice | 4:26.2.5.2-1 | DEBIAN-CVE-2026-63270 |
| Ubuntu:22.04:LTS | libreoffice | no fix listed | UBUNTU-CVE-2026-63270 |
| Ubuntu:24.04:LTS | libreoffice | no fix listed | UBUNTU-CVE-2026-63270 |
| Ubuntu:26.04:LTS | libreoffice | no fix listed | UBUNTU-CVE-2026-63270 |
| Ubuntu:26.10 | libreoffice | no fix listed | UBUNTU-CVE-2026-63270 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| The Document Foundation | LibreOffice | 26.2 – before < 26.2.5 |
Weakness: CWE-200 · Vector: 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