CVE-2021-26120: Debian Linux

Critical severity, CVSS 9.8. EPSS: 82.3% chance of exploitation in the next 30 days.

Smarty before 3.1.39 allows code injection via an unexpected function name after a {function name= substring.

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only; version 11.0 only
• Smarty Smarty: before 3.1.39 (fixed in 3.1.39)

Published 2021-02-22. Last modified 2026-06-17.