What is CVE-2026-26824?

CVE-2026-26824 is a medium-severity vulnerability in Libxls_project Libxls, classified under CWE-457. CVSS score: 6.5/10. Published 2026-06-03.

How severe is CVE-2026-26824?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Libxls_project Libxls

CVE-2026-26824

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…

EPSS: 0.000 (5.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L.

Affected products

Libxls_project Libxls
N/a — versions n/a

Weakness classification (CWE)

CWE-457

References

cve@mitre.org (Exploit, Issue Tracking)

Frequently asked questions

What is CVE-2026-26824?: CVE-2026-26824 is a medium-severity vulnerability in Libxls_project Libxls, classified under CWE-457. CVSS score: 6.5/10. Published 2026-06-03.
How severe is CVE-2026-26824?: Medium severity. CVSS v3 base score is 6.5 out of 10.