In the marshmallow library before 2.15.1 and 3.x before 3.0.0b9 for Python, the schema "only" option treats an empty list as implying no "only" option, which allows a request that was intended to expose no fields to inst…
CVSS 3.0MEDIUM 5.3·Network·No auth·No interaction·EPSS 0.01919·Published 2018-09-18·Fixed in 2.15.1, 3.0.0b9CWE-358