Lura and KrakenD-CE versions older than v2.0.2 and KrakenD-EE versions older than v2.0.0 do not sanitize URL parameters correctly, allowing a malicious user to alter the backend URL defined for a pipe when remote users send crafty URL requests. The vulnerability does not affect KrakenD itself, but the consumed backend might be vulnerable.
https://www.krakend.io/blog/cve-2022-1561-crafted-backend-urls/
https://www.incibe-cert.es/en/early-warning/security-advisories/crafted-backend-urls-lura-project