DEBIAN-CVE-2025-66034

Source
https://security-tracker.debian.org/tracker/CVE-2025-66034
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-66034.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2025-66034
Upstream
Published
2025-11-29T01:16:02Z
Modified
2026-09-01T20:05:56Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

fontTools is a library for manipulating fonts, written in Python. In versions from 4.33.0 to before 4.60.2, the fonttools varLib (or python3 -m fontTools.varLib) script has an arbitrary file write vulnerability that leads to remote code execution when a malicious .designspace file is processed. The vulnerability affects the main() code path of fontTools.varLib, used by the fonttools varLib CLI and any code that invokes fontTools.varLib.main(). This issue has been patched in version 4.60.2.

References

Affected packages

Debian:12 / fonttools

Package

Name
fonttools
Purl
pkg:deb/debian/fonttools?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.38.0-1+deb12u1

Affected versions

4.*
4.38.0-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Database specific

source
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-66034.json"

Debian:13 / fonttools

Package

Name
fonttools
Purl
pkg:deb/debian/fonttools?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.57.0-1+deb13u1

Affected versions

4.*
4.57.0-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Database specific

source
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-66034.json"

Debian:14 / fonttools

Package

Name
fonttools
Purl
pkg:deb/debian/fonttools?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.61.1-1

Affected versions

4.*
4.57.0-1
4.57.0-2
4.57.0-3

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Database specific

source
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-66034.json"