encoded_id-rails versions before 1.0.0.beta2 are affected by an uncontrolled resource consumption vulnerability. A remote and unauthenticated attacker might cause a denial of service condition by sending an HTTP request with an extremely long "id" parameter.
https://vulncheck.com/advisories/vc-advisory-GHSA-3px7-jm2p-6h2c
https://github.com/stevegeek/encoded_id-rails/security/advisories/GHSA-3px7-jm2p-6h2c
https://github.com/stevegeek/encoded_id-rails/commit/afa495a77b8a21ad582611f9cdc2081dc4018b91