CVE-2026-29063

9.8 CRITICAL
Published: March 06, 2026 Modified: April 17, 2026
View on NVD

Description

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

Login to generate AI explanation

CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
9.8 / 10.0
EPSS (Exploit Probability)
0.2%
43th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-1321

Affected Vendors

immutable-js

Related CVEs

CVE-2026-41907 N/A
CVE-2026-41894 N/A
CVE-2026-41492 9.8
CVE-2026-41421 8.8
CVE-2026-41419 7.6