Is fonttools affected by CVE-2025-66034?

PyPI fonttools is affected in >=4.33.0 <4.60.2.

Is CVE-2025-66034 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

medium

CVE-2025-66034

Q: Is CVE-2025-66034 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

PyPI · fonttools

Summary

fontTools is Vulnerable to Arbitrary File Write and XML injection in fontTools.varLib

Severity: medium
EPSS: 0.5% (p38)
Also known as: GHSA-768j-98cg-p3fv
Published: 2025-12-01

References

https://github.com/fonttools/fonttools/security/advisories/GHSA-768j-98cg-p3fv
https://nvd.nist.gov/vuln/detail/CVE-2025-66034
https://github.com/fonttools/fonttools/commit/a696d5ba93270d5954f98e7cab5ddca8a02c1e32

Is your project exposed to this? Stateward checks every dependency on every pull request and flags it only if your code actually reaches it.

Check my repo

Summarize with AI

ChatGPT Claude Perplexity

Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.