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Vulnerabilities/CVE-2026-29063Public Intelligence Dossier
Source: immutable-js · Limited verification•Last verified: •Collection Degraded
CVE-2026-29063Unknown / EvaluatingCRITICAL (raw)CVSS 9.8CWE-1321

Immutable.js provides many Persistent Immutable data structures

Published: 07 Mar 2026•Last updated: 30 Oct 2026, 06:46 PM IST•Source identifier: security-advisories@github.com
Dossier completeness: source-provided sections 2 / 3 · rule guidance available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Unknown
KEV status was not determined.
CVSS score
9.8CRITICAL (raw)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Metric sourcenvd@nist.gov
EPSS probability
1%0.010
Percentile63rd
Weakness type
CWE-1321
CWE-915
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

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.

SOC priority

High Severity / Review

Actively exploited (source statement)

Unknown

Publicly disclosed

Unknown

Risk basis: Microsoft or Microsoft-managed product relevance; CRITICAL severity; Critical source severity without confirmed exploitation

Affected Products & Remediation

27 source-backed products
Affected products and versions (source)
  • immutable-js immutable · >= 3.0.0 < 3.8.3; >= 4.0.0 < 4.3.8; >= 5.0.0 < 5.1.5 · NVD CPE · Source
  • redhat 3scale api management platform · 2.0 · NVD CPE · Source
  • redhat advanced cluster management for kubernetes · >= 2.14 < 2.14.3; >= 2.15 < 2.15.2; >= 2.16 < 2.16.1 · NVD CPE · Source
  • redhat advanced cluster security · >= 4.8.0 < 4.8.11; >= 4.9.0 < 4.9.6; >= 4.10.0 < 4.10.2 · NVD CPE · Source
  • redhat ansible automation platform · 2.0 · NVD CPE · Source
  • redhat build of apicurio registry · 2.0 · NVD CPE · Source
  • redhat connectivity link · 1.0 · NVD CPE · Source
  • redhat developer hub · >= 1.8.0 < 1.8.6; >= 1.9.0 < 1.9.4 · NVD CPE · Source
  • redhat discovery · 2.0 · NVD CPE · Source
  • redhat edge manager · >= 1.0 < 1.0.3; >= 1.1 < 1.1.3 · NVD CPE · Source
  • redhat logging subsystem for red hat openshift · version range not provided by source · NVD CPE · Source
  • redhat migration toolkit · 1.8; for virtualization 2.9.0; for virtualization 2.10.0 · NVD CPE · Source
  • redhat migration toolkit for virtualization · 2.9.0; 2.10.0 · NVD CPE · Source
  • redhat multicluster engine for kubernetes · >= 2.6 < 2.6.10; >= 2.7 < 2.7.10; >= 2.8 < 2.8.5; >= 2.9 < 2.9.3; >= 2.10 < 2.10.2; >= 2.11 < 2.11.1 · NVD CPE · Source
  • redhat network observability operator · 1.11.0; 1.12.3 · NVD CPE · Source
  • redhat openshift cluster observability operator · 1.5.3 · NVD CPE · Source
  • redhat openshift container platform · >= 4.12 < 4.12.93; >= 4.13 < 4.13.69; >= 4.14 < 4.14.68; >= 4.15 < 4.15.66; >= 4.16 < 4.16.63; >= 4.17 < 4.17.54; >= 4.18 < 4.18.39; >= 4.19 < 4.19.32; >= 4.20 < 4.20.23; >= 4.21 < 4.21.17 · NVD CPE · Source
  • redhat openshift data foundation · version range not provided by source · NVD CPE · Source
  • redhat openshift gitops · version range not provided by source · NVD CPE · Source
  • redhat openshift lightspeed · version range not provided by source · NVD CPE · Source
  • redhat openshift pipelines · version range not provided by source · NVD CPE · Source
  • redhat openshift service mesh · version range not provided by source · NVD CPE · Source
  • redhat openshift virtualization · version range not provided by source · NVD CPE · Source
  • redhat quay · version range not provided by source · NVD CPE · Source
  • redhat satellite · version range not provided by source · NVD CPE · Source
  • redhat self-service automation portal · version range not provided by source · NVD CPE · Source
  • redhat enterprise linux · version range not provided by source · NVD CPE · Source
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

Not provided by source

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Unknown
Exploited (source statement)
Unknown
Publicly disclosed (source)
Unknown

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

Matched network-unauthenticated (CVSS AV:N, CVSS PR:N, CVSS UI:N)

Exposure

  1. Identify devices reporting this CVE and note which expose the affected service to untrusted networks.Telemetry: DeviceTvmSoftwareVulnerabilities · A network-reachable, no-privilege vector makes internet-facing instances the first exposure question. · Rule network-unauthenticated

Exploitation evidence

  1. Review inbound connections to the affected service from unexpected sources since the advisory date.Telemetry: DeviceNetworkEvents · Hunting hypothesis from the CVSS vector; it does not show that exploitation occurred. · Rule network-unauthenticated

Response

  1. Confirm the source-stated update is installed and the CVE is no longer reported.Telemetry: DeviceTvmSoftwareVulnerabilities · A follow-up inventory check verifies remediation. · Rule network-unauthenticated

CISA KEV Record

CISA KEV status was not determined for this record.

Change History & Source Data

— No recorded material change

CNA / source
security-advisories@github.com
Record status · verification
UPDATED · NVD API
CPE
cpe:2.3:a:immutable-js:immutable:*:*:*:*:*:node.js:*:*, cpe:2.3:a:redhat:3scale_api_management_platform:2.0:*:*:*:*:*:*:*, cpe:2.3:a:redhat:advanced_cluster_management_for_kubernetes:*:*:*:*:*:*:*:*, cpe:2.3:a:redhat:advanced_cluster_security:*:*:*:*:*:*:*:*, cpe:2.3:a:redhat:advanced_cluster_security:*:*:*:*:*:kubernetes:*:*, cpe:2.3:a:redhat:ansible_automation_platform:2.0:*:*:*:*:*:*:*, cpe:2.3:a:redhat:build_of_apicurio_registry:2.0:*:*:*:*:*:*:*, cpe:2.3:a:redhat:connectivity_link:1.0:*:*:*:*:*:*:*, cpe:2.3:a:redhat:developer_hub:*:*:*:*:*:*:*:*, cpe:2.3:a:redhat:discovery:2.0:*:*:*:*:*:*:*

Evidence & Provenance

3 public sources
github.comSource recordnvd.nist.govSource recordgithub.comSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2026-29063
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2026-29063
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2026-29063"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
Open KQL Library

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Correlated briefings

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.