CVE-2018-20452

8.8 highEPSS 1.5%

The read_MSAT_body function in ole.c in libxls 1.4.0 has an invalid free that allows attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted file, because of inconsistent memory management (new versus free) in ole2_read_header in ole.c.

Severity

CVSS 3.0

8.8 high

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS: 1.5% chance of exploitation in the next 30 days; higher than 74% of CVEs (scores of 2026-10-31)
CWE: CWE-119
Published: 2018-12-25
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

libxls_project:libxls

References

https://github.com/evanmiller/libxls/issues/35
https://security.gentoo.org/glsa/202003-64
https://github.com/evanmiller/libxls/issues/35
https://security.gentoo.org/glsa/202003-64

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