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CVE-2026-63270

Environment/ini-file leaks

MEDIUM
6.7
CVSS Score
Published: October 5, 2026 at 11:17 AM UTC
Updated: October 6, 2026 at 03:03 PM UTC
1 product affected across 1 vendorLibreOffice

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Severity
MEDIUM6.7
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

LibreOffice· Document
60%
26.2 ≤ v < < 26.2.526.2

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://www.libreoffice.org/about-us/security/advisories/cve-2026-63270

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.7MEDIUMDocument Fdn.
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-200

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