CVE-2022-21803

Name: CVE-2022-21803
Creator: NVD / NIST
Published: 2022-04-12T16:15:08.48+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.70%

Last modified Jun 17, 2026

CVE-2022-21803 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. This affects the package nconf before 0.11.4. When using the memory engine, it is possible to store a nested JSON representation of the configuration. EPSS estimates a 1.70% chance of exploitation in the next 30 days.

Description

This affects the package nconf before 0.11.4. When using the memory engine, it is possible to store a nested JSON representation of the configuration. The .set() function, that is responsible for setting the configuration properties, is vulnerable to Prototype Pollution. By providing a crafted property, it is possible to modify the properties on the Object.prototype.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.70%

74.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1321

Affected Software

Vendor	Product	Versions
Nconf Project	Nconf	< 0.11.4

References

https://github.com/indexzero/nconf/pull/397Issue Tracking, Patch, Third Party Advisory
https://github.com/indexzero/nconf/releases/tag/v0.11.4Release Notes, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2632450Exploit, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-NCONF-2395478Exploit, Third Party Advisory
https://github.com/indexzero/nconf/pull/397Issue Tracking, Patch, Third Party Advisory
https://github.com/indexzero/nconf/releases/tag/v0.11.4Release Notes, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2632450Exploit, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-NCONF-2395478Exploit, Third Party Advisory

Timeline

Published: Apr 12, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-21803?

How severe is CVE-2022-21803?

CVE-2022-21803 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.70% probability of exploitation in the next 30 days.

How do I fix CVE-2022-21803?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-21803?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST