{"id":"CVE-2018-17175","aliases":["GHSA-9q2p-fj49-vpxj","PYSEC-2018-67"],"url":"https://o3.security/vulnerability/CVE-2018-17175","summary":"In marshmallow library the schema \"only\" option treats an empty list as implying no \"only\" option","details":"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 instead expose all fields (if the schema is being filtered dynamically using the \"only\" option, and there is a user role that produces an empty value for \"only\").","published":"2018-09-18T17:29:01.867Z","modified":"2026-07-08T17:16:44.989479Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"marshmallow","fixedVersion":"2.15.1"},{"ecosystem":"PyPI","name":"marshmallow","fixedVersion":"3.0.0b9"}],"fix":{"url":"https://github.com/marshmallow-code/marshmallow/pull/777","label":"marshmallow-code/marshmallow#777"},"references":[{"type":"ADVISORY","url":"https://github.com/marshmallow-code/marshmallow/pull/777"},{"type":"ADVISORY","url":"https://github.com/marshmallow-code/marshmallow/pull/782"},{"type":"REPORT","url":"https://github.com/marshmallow-code/marshmallow/issues/772"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T17:16:44.989479Z"}}