set-in provides the set value of nested associative structure given array of keys. A prototype pollution vulnerability exists in the the npm package set-in (>=2.0.1, < 2.0.5). Despite a previous fix that attempted to mitigate prototype pollution by checking whether user input contained a forbidden key, it is still possible to pollute Object.prototype via a crafted input using Array.prototype. This has been fixed in version 2.0.5.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact High

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00025.

Exploitation poc

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
ahdinosaur set-in affected
Version Status Constraints
>= 2.0.1, < 2.0.5 affected —

Configuration 1 [-]

cpe:2.3:a:set-in_project:set-in:*:*:*:*:*:*:*:*

No data.

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Vendors Products
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Set-in Project Subscribe
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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-2c4m-g7rx-63q7 set-in Affected by Prototype Pollution
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/ahdinosaur/set-in/commit/b8e1dabfdbd35c8d604b6324e01d03f280256c3d cve-icon cve-icon
https://github.com/ahdinosaur/set-in/security/advisories/GHSA-2c4m-g7rx-63q7 cve-icon cve-icon
History

Fri, 13 Feb 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Set-in Project
Set-in Project set-in
CPEs cpe:2.3:a:set-in_project:set-in:*:*:*:*:*:*:*:*
Vendors & Products Set-in Project
Set-in Project set-in
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Thu, 12 Feb 2026 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Thu, 12 Feb 2026 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Ahdinosaur
Ahdinosaur set-in
Vendors & Products Ahdinosaur
Ahdinosaur set-in

Wed, 11 Feb 2026 21:30:00 +0000

Type Values Removed Values Added
Description set-in provides the set value of nested associative structure given array of keys. A prototype pollution vulnerability exists in the the npm package set-in (>=2.0.1, < 2.0.5). Despite a previous fix that attempted to mitigate prototype pollution by checking whether user input contained a forbidden key, it is still possible to pollute Object.prototype via a crafted input using Array.prototype. This has been fixed in version 2.0.5.
Title Prototype pollution in set-in
Weaknesses CWE-1321
References
Metrics cvssV4_0

{'score': 9.4, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-02-12T21:16:04.618Z

Reserved: 2026-02-09T21:36:29.554Z

Link: CVE-2026-26021

cve-icon Vulnrichment

Updated: 2026-02-12T21:15:58.717Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-11T22:15:52.077

Modified: 2026-02-13T21:43:27.900

Link: CVE-2026-26021

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-12T09:03:14Z

Weaknesses