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Prototype Pollution in mixin-deep

Critical severity GitHub Reviewed Published Aug 27, 2019 to the GitHub Advisory Database • Updated Nov 29, 2023

Package

npm mixin-deep (npm)

Affected versions

< 1.3.2
= 2.0.0

Patched versions

1.3.2
2.0.1

Description

Versions of mixin-deep prior to 2.0.1 or 1.3.2 are vulnerable to Prototype Pollution. The mixinDeep function fails to validate which Object properties it updates. This allows attackers to modify the prototype of Object, causing the addition or modification of an existing property on all objects.

Recommendation

If you are using mixin-deep 2.x, upgrade to version 2.0.1 or later.
If you are using mixin-deep 1.x, upgrade to version 1.3.2 or later.

References

Published by the National Vulnerability Database Aug 23, 2019
Reviewed Aug 27, 2019
Published to the GitHub Advisory Database Aug 27, 2019
Last updated Nov 29, 2023

Severity

Critical

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
Low
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:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.739%
(81st percentile)

Weaknesses

CVE ID

CVE-2019-10746

GHSA ID

GHSA-fhjf-83wg-r2j9

Source code

No known source code
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