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Prototype Pollution in deepmerge-ts

High severity GitHub Reviewed Published Mar 31, 2022 in RebeccaStevens/deepmerge-ts • Updated Jan 27, 2023

Package

npm deepmerge-ts (npm)

Affected versions

< 4.0.2

Patched versions

4.0.2

Description

deepmerge-ts is used to merge 2 or more objects respecting type information. deepmerge-ts is vulnerable to Prototype Pollution via file deepmerge.ts, function defaultMergeRecords(). A fix was released in version 4.0.2. Currently, there is no known workaround.

References

@RebeccaStevens RebeccaStevens published to RebeccaStevens/deepmerge-ts Mar 31, 2022
Published by the National Vulnerability Database Apr 1, 2022
Published to the GitHub Advisory Database Apr 1, 2022
Reviewed Apr 1, 2022
Last updated Jan 27, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.273%
(69th percentile)

Weaknesses

CVE ID

CVE-2022-24802

GHSA ID

GHSA-r9w3-g83q-m6hq

Source code

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