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CVE-2026-63278

libreoffice: LibreOffice: Information disclosure via crafted URLs expanding environment variables

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Severity

Moderate

Red Hat Product Security

5

CVSS 3.1

Review impact separately from score.

Published · September 22, 2026

Updated · September 23, 2026

Description

A flaw was found in LibreOffice. A remote attacker could craft a malicious document containing specially constructed URLs. When a user opens this document, these URLs could expand environment variables or INI file values, leading to the exfiltration of potentially sensitive information to a remote server. This vulnerability allows for unauthorized disclosure of local system configuration or user-specific data.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

CWE-914 · Improper Control of Dynamically-Identified Variables