5.3

CVE-2026-26825

Exploit
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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Libxls Project ≫ Libxls Version 1.6.3
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.21% 0.116
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 5.3 3.9 1.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA-ADP 5.3 3.9 1.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE-908 Use of Uninitialized Resource

The product uses or accesses a resource that has not been initialized.

https://github.com/libxls/libxls/issues/156
Exploit
Issue Tracking
https://github.com/libxls/libxls/issues/153
https://github.com/libxls/libxls/commit/9adf88f4e3b304e397f70ac189e70776edb6d5a3