CVE-2026-110648
HIGH 8.5@offactory/compress-fonts before 1.1.1 contains an OS command injection vulnerability that allows attackers to execute shell commands by supplying font files with crafted names. Font paths are interpolated unquoted into a FontForge command run through child_process.execSync, so shell metacharacters in file names execute commands with the Node.js process privileges.
Severe if exploited (CVSS 8.5), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
1.1%chance of exploitation in 30 days · 67th percentile
Impact if exploited
8.5CVSS 4.0 · HIGH
- ConfidentialityHigh
- IntegrityHigh
- AvailabilityHigh
What an attacker needs
- ⚠Access: Requires local access to the host
- ✓Privileges: No account or privileges required
- ⚠User interaction: Succeeds with passive user activity
- ✓Complexity: No special conditions — reliably repeatable
- ✓Requirements: No special attack requirements
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
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Data snapshot:
Weakness (CWE)
- CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CVSS vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References and research data (JSON)
All CVSS metrics
- HIGH 8.5 v4.0 · CNA Primary
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - HIGH 7.8 v3.1 · CNA Primary
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - HIGH 8.5 v4.0 · NVD Secondary
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - HIGH 7.8 v3.1 · NVD Secondary
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
Patches & mitigations
- https://github.com/adamarcanov/compress-fonts/pull/1 CVE record · VulnCheck · Updated 2026-10-14T14:17:16.381Z
NVD · CVE-2026-110648 · Updated 2026-10-16T19:03:18.127 - https://github.com/adamarcanov/compress-fonts/commit/12002e5866af2163cd34424baae5a53338951a5d CVE record · VulnCheck · Updated 2026-10-14T14:17:16.381Z
NVD · CVE-2026-110648 · Updated 2026-10-16T19:03:18.127
Advisories
- https://www.vulncheck.com/advisories/offactory-compress-fonts-before-1.1.1-os-command-injection-via-font-file-names CVE record · VulnCheck · Updated 2026-10-14T14:17:16.381Z
NVD · CVE-2026-110648 · Updated 2026-10-16T19:03:18.127 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-101276 EUVD · EUVD-2026-101276
Technical & other
- https://github.com/adamarcanov/compress-fonts/blob/7b07d20b3125a7bba8f933eeca21f5a09c8fb62a/index.js#L48 CVE record · VulnCheck · Updated 2026-10-14T14:17:16.381Z
NVD · CVE-2026-110648 · Updated 2026-10-16T19:03:18.127