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CVE-2020-35149

18
FAUCET Score

CVE-2020-35149 describes a prototype pollution vulnerability in the mquery library, specifically affecting versions prior to 3.2.3. This medium-severity vulnerability (CVSS 5.3) allows an unauthenticated attacker to inject arbitrary properties into JavaScript object prototypes during merge or clone operations, potentially leading to denial of service or information disclosure. While the attack complexity is low and no user interaction is required, there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.2.3CPE matchmatch criteria
cpe:2.3:a:mquery_project:mquery:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.03%
Probability of exploitation in next 30 days
EPSS Percentile
60.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0103 is in the 38th 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

No media coverage found for this CVE.

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 (3)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: mqueryFixed in: 3.2.3
redhatpatch availablevia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2.1 for RHEL 8Fixed in: rhacm2/acm-must-gather-rhel8:v2.1.6-6
View patch

Vendor Advisories (2)

npmGHSA-45q2-34rf-mr94medium

Code Injection in mquery

Dec 18, 2020
redhatCVE-2020-35149Moderate

mquery: Code injection via merge or clone operation

Dec 11, 2020

References

github.com / aheckmann/mquery/commit/792e69fd0a7281a0300be5cade5a6d7c1d468ad4
PatchThird Party Advisory