CVE-2022-21803

Prototype Pollution

HIGH
7.5
CVSS Score
Published: April 12, 2022 at 03:20 PM UTC
Updated: June 17, 2026 at 04:27 AM UTC
1 product affected across 1 vendorNconf

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Severity
HIGH7.5
Exploit prediction
EPSS 2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 0.11.4
Affected range stops below 0.11.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (4)

x_refsource_MISCIssue TrackingPatchThird Party Advisory
https://github.com/indexzero/nconf/pull/397
x_refsource_MISCRelease NotesThird Party Advisory
https://github.com/indexzero/nconf/releases/tag/v0.11.4
x_refsource_MISCExploitThird Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2632450
x_refsource_MISCExploitThird Party Advisory
https://snyk.io/vuln/SNYK-JS-NCONF-2395478

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-1321

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