CVE-2026-29063

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-29063
Immutable.js provides many Persistent Immutable data structures. Prior to versions 3.8.3, 4.3.7, and 5.1.5, Prototype Pollution is possible in immutable via the mergeDeep(), mergeDeepWith(), merge(), Map.toJS(), and Map.toObject() APIs. This issue has been patched in versions 3.8.3, 4.3.7, and 5.1.5.

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/immutable-js/immutable-js/releases/tag/v3.8.3 Release Notes
https://github.com/immutable-js/immutable-js/releases/tag/v4.3.8 Release Notes
https://github.com/immutable-js/immutable-js/releases/tag/v5.1.5 Release Notes
https://github.com/immutable-js/immutable-js/security/advisories/GHSA-wf6x-7x77-mvgw Exploit Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:immutable-js:immutable:*:*:*:*:*:node.js:*:*
cpe:2.3:a:immutable-js:immutable:*:*:*:*:*:node.js:*:*
cpe:2.3:a:immutable-js:immutable:*:*:*:*:*:node.js:*:*
History

17 Apr 2026, 21:32

Type Values Removed Values Added
References () https://github.com/immutable-js/immutable-js/releases/tag/v3.8.3 - () https://github.com/immutable-js/immutable-js/releases/tag/v3.8.3 - Release Notes
References () https://github.com/immutable-js/immutable-js/releases/tag/v4.3.8 - () https://github.com/immutable-js/immutable-js/releases/tag/v4.3.8 - Release Notes
References () https://github.com/immutable-js/immutable-js/releases/tag/v5.1.5 - () https://github.com/immutable-js/immutable-js/releases/tag/v5.1.5 - Release Notes
References () https://github.com/immutable-js/immutable-js/security/advisories/GHSA-wf6x-7x77-mvgw - () https://github.com/immutable-js/immutable-js/security/advisories/GHSA-wf6x-7x77-mvgw - Exploit, Vendor Advisory
Summary
  • (es) Immutable.js proporciona muchas estructuras de datos inmutables persistentes. Antes de las versiones 3.8.3, 4.3.7 y 5.1.5, la contaminación de prototipos es posible en immutable a través de las APIs mergeDeep(), mergeDeepWith(), merge(), Map.toJS() y Map.toObject(). Este problema ha sido parcheado en las versiones 3.8.3, 4.3.7 y 5.1.5.
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 9.8
CPE cpe:2.3:a:immutable-js:immutable:*:*:*:*:*:node.js:*:*
First Time Immutable-js
Immutable-js immutable

06 Mar 2026, 19:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-03-06 19:16

Updated : 2026-04-17 21:32

NVD link : CVE-2026-29063

Mitre link : CVE-2026-29063

CVE.ORG link : CVE-2026-29063

JSON object : View

Products Affected

immutable-js

  • immutable
CWE
CWE-1321

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