CVE-2026-79591

Published: Sep 10, 2026Modified: Sep 22, 2026Deferred

7.8

Vector

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

Exploitability: 1.8 / Impact: 5.9

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

A heap-buffer-overflow and use-after-free vulnerability exists in the xls_getCSS() function of libxls 1.6.3 due to insufficient validation of a file-controlled font index.

Related CWEs

CWE-122

Heap-based Buffer Overflow

A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

References (3)

https://github.com/libxls/libxls/issues/161

Source: cve@mitre.org

https://github.com/libxls/libxls/pull/164/changes/902c8f9b13710c3a13b6232fb86626c5c729402c

Source: cve@mitre.org

https://github.com/libxls/libxls/issues/161

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.