CVE-2026-54659 Pagy I18n locale option is not validated before being used in a file path

Pagy is agnostic pagination in plain Ruby. From 43.0.0 until 43.5.6, Pagy::I18n.locale= in gem/lib/pagy/modules/i18n/i18n.rb stored locale values verbatim and later used them as .yml path components, allowing untrusted params:locale values with absolute paths or ../ sequences to create a file...

PT-2026-65636

Summary Pagy::I18n.locale= did not validate its argument before using it as a path component to load the matching dictionary file .yml. An application that assigns untrusted input to the locale — e.g. the common pattern Pagy::I18n.locale = params:locale — let that input influence which file Pagy...