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Vulnerability record · CVE-2020-5496 · published 3 January 2020

CVE-2020-5496: Fontforge out-of-bounds write vulnerability

Fontforge · Fontforge

FontForge 20190801 has a heap-based buffer overflow in the Type2NotDefSplines() function in splinesave.c.

8.8 CVSS 3.1 High EPSS 2.4% · top 16.9% CWE-787 · Out-of-bounds write
8.8CVSS 3.1 base score, v2 6.8
2.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

FontForge 20190801 has a heap-based buffer overflow in the Type2NotDefSplines() function in splinesave.c.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00041.html Third Party Advisory
https://github.com/fontforge/fontforge/issues/4085 ExploitIssue TrackingThird Party Advisory
https://lists.debian.org/debian-lts-announce/2024/03/msg00007.html
https://security.gentoo.org/glsa/202004-14 Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00041.html Third Party Advisory
https://github.com/fontforge/fontforge/issues/4085 ExploitIssue TrackingThird Party Advisory
https://lists.debian.org/debian-lts-announce/2024/03/msg00007.html
https://security.gentoo.org/glsa/202004-14 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-5496), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.