Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2018-17175

21
FAUCET Score

CVE-2018-17175 describes a vulnerability in the marshmallow library (versions before 2.15.1 and 3.x before 3.0.0b9) for Python. This flaw allows an attacker to bypass intended field restrictions, potentially exposing all fields of a schema when an empty "only" option is dynamically applied. Rated as Medium severity (CVSS 5.3), it is a network-exploitable vulnerability with low attack complexity, leading to a potential loss of confidentiality. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.15.1CPE matchmatch criteria
cpe:2.3:a:marshmallow_project:marshmallow:*:*:*:*:*:*:*:*
>= 3.0, < 3.0.0b9CPE matchmatch criteria
cpe:2.3:a:marshmallow_project:marshmallow:*:*:*:*:*:python:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.86%
Probability of exploitation in next 30 days
EPSS Percentile
77.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0186 is in the 64th percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

pippatch availablevia ghsa
Product: marshmallowFixed in: 2.15.1
pippatch availablevia ghsa
Product: marshmallowFixed in: 3.0.0b9
ubuntupatch availablevia ubuntu_usn
Product: python-marshmallow (bionic)Fixed in: 3.0.0b3-1ubuntu0.1~esm1
ubuntupatch availablevia ubuntu_usn
Product: python-marshmallow (focal)Fixed in: 3.4.0-1ubuntu0.1~esm1
ubuntupatch availablevia ubuntu_usn
Product: python-marshmallow (jammy)Fixed in: 3.13.0-1ubuntu0.1~esm1
ubuntupatch availablevia ubuntu_usn
Product: python-marshmallow (noble)Fixed in: 3.20.1-1.1ubuntu0.1~esm1
ubuntupatch availablevia ubuntu_usn
Product: python-marshmallow (resolute)Fixed in: 3.26.1-0.4ubuntu0.1~esm1

Vendor Advisories (2)

ubuntuUSN-8225-1

Python marshmallow vulnerabilities

Apr 30, 2026
pipGHSA-9q2p-fj49-vpxjmedium

In marshmallow library the schema "only" option treats an empty list as implying no "only" option

Oct 10, 2018

References

github.com / marshmallow-code/marshmallow/issues/772
Issue TrackingThird Party Advisory
github.com / marshmallow-code/marshmallow/pull/777
Third Party Advisory
github.com / marshmallow-code/marshmallow/pull/782
Third Party Advisory