What is CVE-2025-50951?

CVE-2025-50951 is a medium-severity vulnerability in Fontforge, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 6.5/10. Published 2025-10-23.

How severe is CVE-2025-50951?

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

Vulnerability in Fontforge

CVE-2025-50951

FontForge v20230101 was discovered to contain a memory leak via the utf7toutf8_copy function at /fontforge/sfd.c.

Published 2025-10-23 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.003 (15.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000

Affected products

Fontforge — versions 2023-01-01

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

github.com/fontforge/fontforge/pull/5495 (Patch)

Frequently asked questions

What is CVE-2025-50951?: CVE-2025-50951 is a medium-severity vulnerability in Fontforge, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 6.5/10. Published 2025-10-23.
How severe is CVE-2025-50951?: Medium severity. CVSS v3 base score is 6.5 out of 10.