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CVE-2026-29063: Immutable.js: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in immutable

High · CVSS 8.8 (CVSS 3.1)EPSS 1.0%, 63th percentilePublished Updated Assigner: GitHub_M

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.

Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H · CWE-1321

Tracked companies

ConfluenceJira

Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.

Status incidents that name it

No tracked status incident names this CVE.

Affected vendors and products

immutable-js: immutable-jsRed Hat: Cluster Observability Operator 1.5.0Red Hat: Logging Subsystem for Red Hat OpenShiftRed Hat: Node HealthCheck OperatorRed Hat: OpenShift LightspeedRed Hat: OpenShift PipelinesRed Hat: OpenShift Service Mesh 3Red Hat: Red Hat 3scale API Management Platform 2Red Hat: Red Hat Advanced Cluster Management for Kubernetes 2.14Red Hat: Red Hat Advanced Cluster Management for Kubernetes 2.15Red Hat: Red Hat Advanced Cluster Management for Kubernetes 2.16Red Hat: Red Hat Advanced Cluster Security 4.8Red Hat: Red Hat Advanced Cluster Security 4.9Red Hat: Red Hat Advanced Cluster Security for Kubernetes 4.10Red Hat: Red Hat Ansible Automation Platform 2Red Hat: Red Hat build of Apicurio Registry 2Red Hat: Red Hat Connectivity Link 1Red Hat: Red Hat Discovery 2Red Hat: Red Hat Edge Manager 1.0Red Hat: Red Hat Edge Manager 1.1Red Hat: Red Hat Enterprise Linux 10Red Hat: Red Hat Enterprise Linux 8Red Hat: Red Hat Enterprise Linux 9Red Hat: Red Hat OpenShift AI (RHOAI)Red Hat: Red Hat OpenShift Container Platform 4Red Hat: Red Hat OpenShift GitOpsRed Hat: Red Hat OpenShift Virtualization 4Red Hat: Red Hat Satellite 6Red Hat: Self-service automation portal 2

References

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