Fedora has issued an advisory on June 23: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/OKYNZEZSXKB2SF5DVT2O2M4ONY5JR7MH/ The issue is fixed upstream in 2.0.2. Mageia 5 is also affected.
Cauldron already has 2.0.3 From reading https://github.com/sinatra/sinatra/issues/1428 it seems only 2.0.0 and 2.0.1 are affected, not older versions Mageia 6 has 1.4.6 so it seems we are fine
I'll verify later if this is correct For the record, the commit fixing it is https://github.com/sinatra/sinatra/commit/12786867d6faaceaec62c7c2cb5b0e2dc074d71a
After reading the code, I can confirm the problem doesn't exist in 1.4.6 as the code hadn't been added yet
Status: NEW => RESOLVEDResolution: (none) => WORKSFORME