Net::Statsd::Lite versions through 0.10.0 for Perl allowed metric injections. The values from the set_add method were not checked for newlines, colons or pipes. Metrics generated from untrusted sources could inject additional statsd metrics. Note that version 0.9.0 fixed a similar issue CVE-2026-46719 for metric names.
https://www.cve.org/CVERecord?id=CVE-2026-46719
https://metacpan.org/release/RRWO/Net-Statsd-Lite-v0.10.1/changes