CVE-2026-35611 Addressable has a Regular Expression Denial of Service in Addressable templates

Addressable is an alternative implementation to the URI implementation that is part of Ruby's standard library. From 2.3.0 to before 2.9.0, within the URI template implementation in Addressable, two classes of URI template generate regular expressions vulnerable to catastrophic backtracking...

rubygem-addressable: ReDoS in templates

A resource-consumption vulnerability was found in rubygem addressable, where its URI template implementation could allow an attacker's crafted template to consume resources, resulting in a denial of service. The highest threat from this vulnerability is to system availability...