CVE-2026-26021

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-26021
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.

9.8 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/ahdinosaur/set-in/commit/b8e1dabfdbd35c8d604b6324e01d03f280256c3d Patch
https://github.com/ahdinosaur/set-in/security/advisories/GHSA-2c4m-g7rx-63q7 Exploit Vendor Advisory
Configurations

Configuration 1 (hide)

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

17 Jun 2026, 10:25

Type Values Removed Values Added
Summary
  • (es) set-in proporciona el valor establecido de una estructura asociativa anidada dado un array de claves. Una vulnerabilidad de contaminación de prototipos existe en el paquete npm set-in (&gt;=2.0.1, &lt; 2.0.5). A pesar de una corrección anterior que intentó mitigar la contaminación de prototipos al verificar si la entrada del usuario contenía una clave prohibida, todavía es posible contaminar Object.prototype a través de una entrada manipulada usando Array.prototype. Esto ha sido corregido en la versión 2.0.5.

13 Feb 2026, 21:43

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 9.8
CPE cpe:2.3:a:set-in_project:set-in:*:*:*:*:*:*:*:*
References () https://github.com/ahdinosaur/set-in/commit/b8e1dabfdbd35c8d604b6324e01d03f280256c3d - () https://github.com/ahdinosaur/set-in/commit/b8e1dabfdbd35c8d604b6324e01d03f280256c3d - Patch
References () https://github.com/ahdinosaur/set-in/security/advisories/GHSA-2c4m-g7rx-63q7 - () https://github.com/ahdinosaur/set-in/security/advisories/GHSA-2c4m-g7rx-63q7 - Exploit, Vendor Advisory
First Time Set-in Project
Set-in Project set-in

11 Feb 2026, 22:15

Type Values Removed Values Added
New CVE
Information

Published : 2026-02-11 22:15

Updated : 2026-06-17 10:25

NVD link : CVE-2026-26021

Mitre link : CVE-2026-26021

CVE.ORG link : CVE-2026-26021

JSON object : View

Products Affected

set-in_project

  • set-in
CWE
CWE-1321

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')