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CVE-2020-15366

16
FAUCET Score

CVE-2020-15366 describes a prototype pollution vulnerability in Ajv (Another JSON Schema Validator) version 6.12.2, specifically within the ajv.validate() function. A maliciously crafted JSON schema can lead to arbitrary code execution, affecting applications utilizing this library. The vulnerability has a CVSS score of 5.6 (MEDIUM), indicating a network-based attack with high attack complexity and low impacts on confidentiality, integrity, and availability. While untrusted schemas are generally discouraged, the potential for code execution rather than just a denial of service is a significant concern. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE. It is not listed on the CISA KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
6.12.2CPE matchmatch criteria
cpe:2.3:a:ajv.js:ajv:6.12.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.6MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
2.2
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.31%
Probability of exploitation in next 30 days
EPSS Percentile
81.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0231 is in the 70th percentile among its peer group of 19,955 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 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 (35)

npmpatch availablevia ghsa
Product: ajvFixed in: 6.12.3
redhatpatch availablevia redhat_api
Product: Red Hat Automation Hub 4.2 for RHEL 7Fixed in: automation-hub-0:4.2.2-1.el7pc
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Automation Hub 4.2 for RHEL 7Fixed in: python3-django-0:2.2.18-1.el7pc
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Automation Hub 4.2 for RHEL 7Fixed in: python-bleach-0:3.3.0-1.el7pc
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Automation Hub 4.2 for RHEL 7Fixed in: python-bleach-allowlist-0:1.0.3-1.el7pc
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Automation Hub 4.2 for RHEL 7Fixed in: python-galaxy-importer-0:0.2.15-1.el7pc
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Automation Hub 4.2 for RHEL 7Fixed in: python-galaxy-ng-0:4.2.2-1.el7pc
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Automation Hub 4.2 for RHEL 7Fixed in: python-pulp-ansible-1:0.5.6-1.el7pc
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Automation Hub 4.2 for RHEL 8Fixed in: automation-hub-0:4.2.2-1.el8pc
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Automation Hub 4.2 for RHEL 8Fixed in: python3-django-0:2.2.18-1.el8pc
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Automation Hub 4.2 for RHEL 8Fixed in: python-bleach-0:3.3.0-1.el8pc
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Automation Hub 4.2 for RHEL 8Fixed in: python-bleach-allowlist-0:1.0.3-1.el8pc
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Automation Hub 4.2 for RHEL 8Fixed in: python-galaxy-importer-0:0.2.15-1.el8pc
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Automation Hub 4.2 for RHEL 8Fixed in: python-galaxy-ng-0:4.2.2-1.el8pc
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Automation Hub 4.2 for RHEL 8Fixed in: python-pulp-ansible-1:0.5.6-1.el8pc
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: nodejs:12-8030020201124152102.229f0a1c
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: nodejs:10-8030020210118191659.229f0a1c
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: nodejs:14-8030020210126165503.229f0a1c
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 4.6Fixed in: openshift4/ose-console:v4.6.0-202010100121.p0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 4.6Fixed in: openshift4/ose-prometheus:v4.6.0-202009290409.p0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Quay 3Fixed in: quay/quay-rhel8:v3.6.0-62
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-nodejs12-nodejs-0:12.19.1-2.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-nodejs14-nodejs-0:14.15.4-2.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-nodejs10-nodejs-0:10.23.1-2.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-nodejs12-nodejs-0:12.19.1-2.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-nodejs14-nodejs-0:14.15.4-2.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-nodejs10-nodejs-0:10.23.1-2.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSFixed in: rh-nodejs12-nodejs-0:12.19.1-2.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSFixed in: rh-nodejs14-nodejs-0:14.15.4-2.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSFixed in: rh-nodejs10-nodejs-0:10.23.1-2.el7
View patch
redhatvendor investigatingvia redhat_api
Product: OpenShift Service Mesh 1Fixed in: kiali
redhatvendor investigatingvia redhat_api
Product: OpenShift Service Mesh 1Fixed in: servicemesh-grafana
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: openshift3/ose-console
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift4/ose-grafana
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Virtualization 1Fixed in: kubevirt-web-ui

Vendor Advisories (2)

npmGHSA-v88g-cgmw-v5xwmedium

Prototype Pollution in Ajv

Feb 10, 2022
redhatCVE-2020-15366Moderate

nodejs-ajv: prototype pollution via crafted JSON schema in ajv.validate function

Jul 4, 2020

References

github.com / ajv-validator/ajv/releases/tag/v6.12.3
Release NotesThird Party Advisory
github.com / ajv-validator/ajv/tags
Third Party Advisory
hackerone.com / bugs
Permissions Required
security.netapp.com / advisory/ntap-20240621-0007