CVE-2026-27120

Leafkit is a templating language with Swift-inspired syntax. Prior to 1.4.1, htmlEscaped in leaf-kit will only escape html special characters if the extended grapheme clusters match, which allows bypassing escaping by using an extended grapheme cluster containing both the special html character a...

CVE-2026-27120: Failure to Sanitize Special Elements into a Different Plane (Special Element Injection)

Leafkit is a templating language with Swift-inspired syntax. Prior to 1.4.1, htmlEscaped in leaf-kit will only escape html special characters if the extended grapheme clusters match, which allows bypassing escaping by using an extended grapheme cluster containing both the special html character a...

Leafkit security vulnerabilities

Leafkit is an open-source application developed by Vapor. It uses Swift to create modular server-side software. Versions of Leafkit prior to 1.4.1 contained security vulnerabilities. These vulnerabilities stemmed from the fact that htmlEscaped only matched extended character clusters, which could...