CVE-2026-26824

MediumCVSS 6.5/10Last modified Sep 23, 2026

Description

libxls through version 1.6.3 contains a use of uninitialized memory vulnerability in the OLE container parser. Memory allocated for the Master Sector Allocation Table (MSAT) in read_MSAT() is not fully initialized before being consumed by ole2_validate_sector_chain(), which may result in application crashes or potential information disclosure when processing a crafted XLS file

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

Weakness enumeration

CWE-457

Affected software

No affected versions have been published.

Timeline

Published: Jun 3, 2026
Last modified: Sep 23, 2026
NVD status: Modified

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