CVEvulnerability

CVE-2026-26825

5.3 MEDIUM Published 2026-06-03 Modified 2026-09-23 Official page ↗
Status
Modified
Published
2026-06-03
Last modified
2026-09-23
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weaknesses
CWE-908

Description

A use-of-uninitialized memory vulnerability exists in libxls 1.6.3 when parsing malformed XLS files. The issue is reachable via xls_parseWorkBook() and is triggered by uninitialized heap memory originating from the OLE layer (ole2_read). The flaw is detectable with MemorySanitizer (MSAN) and can lead to undefined behavior, incorrect parsing logic, or potential information disclosure.

Affected configurations

• libxls project libxls 1.6.3

Related

Weakness · CWE (1)

  • CWE-908 Use of Uninitialized Resource weakness

References