CVE-2018-17175
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…
Does this matter?
Lower severity and a low EPSS score (1.92%). Track it; it rarely justifies an emergency change on its own.
Description
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").
- CVSS 3.0
- 5.3 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 1.92% probability · 80th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- marshmallow project/marshmallow
- Source
- cve@mitre.org
EPSS 1.9% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/marshmallow-code/marshmallow/issues/772Issue Tracking, Third Party Advisory
- https://github.com/marshmallow-code/marshmallow/pull/777Third Party Advisory
- https://github.com/marshmallow-code/marshmallow/pull/782Third Party Advisory
- https://github.com/marshmallow-code/marshmallow/issues/772Issue Tracking, Third Party Advisory
- https://github.com/marshmallow-code/marshmallow/pull/777Third Party Advisory
- https://github.com/marshmallow-code/marshmallow/pull/782Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.