Dancer2::Plugin::Auth::OAuth versions before 0.22 for Perl default to a predictable nonce. The default nonce was generated using an MD5 hash of the epoch time, which is predictable.
https://www.cve.org/CVERecord?id=CVE-2025-22376
https://metacpan.org/release/BIAFRA/Dancer2-Plugin-Auth-OAuth-0.22/changes