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No exploitation reportedFix available

CVE-2026-29063

No exploitation reported by the sources we read.

  • Published2026-03-06
  • Fixed in4.21.17 · 4.20.23 · 4.19.32 · 4.18.39 · 4.17.54 · 4.16.63
  • WeaknessCWE-1321 · CWE-915

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-03-0619:16CVE publishedNVD

Versions per branch

NVD
Redhat openshift container platform
BranchAffectedFixed in
4.21≥ 4.21, < 4.21.174.21.17
4.20≥ 4.20, < 4.20.234.20.23
4.19≥ 4.19, < 4.19.324.19.32
4.18≥ 4.18, < 4.18.394.18.39
4.17≥ 4.17, < 4.17.544.17.54
4.16≥ 4.16, < 4.16.634.16.63
4.15≥ 4.15, < 4.15.664.15.66
4.14≥ 4.14, < 4.14.684.14.68
4.13≥ 4.13, < 4.13.694.13.69
4.12≥ 4.12, < 4.12.934.12.93
4.0= 4.0no fix published
Redhat quay
BranchAffectedFixed in
3.17≥ 3.17.0, < 3.17.23.17.2
3.16≥ 3.16.0, < 3.16.43.16.4
3.15≥ 3.15.0, < 3.15.43.15.4
3.12≥ 3.12.0, < 3.12.163.12.16
3.10≥ 3.10.0, < 3.10.213.10.21
3.9≥ 3.9.0, < 3.9.203.9.20
3.18= 3.18.0no fix published
Redhat multicluster engine for kubernetes
BranchAffectedFixed in
2.11≥ 2.11, < 2.11.12.11.1
2.10≥ 2.10, < 2.10.22.10.2
2.9≥ 2.9, < 2.9.32.9.3
2.8≥ 2.8, < 2.8.52.8.5
2.7≥ 2.7, < 2.7.102.7.10
2.6≥ 2.6, < 2.6.102.6.10

24 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • immutable-js
    Affected
    • = < 3.8.3no fix stated
    • = < 4.3.7no fix stated
    • = < 5.1.5no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-03-06

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • @rootio/immutableRoot:npmall versions · fixed in 5.1.4-root.io.1
  • @rootio/immutableRoot:npmall versions · fixed in 3.7.6-root.io.1
  • @rootio/immutableRoot:npmall versions · fixed in 3.7.6-root.io.2
  • @rootio/immutableRoot:npmall versions · fixed in 3.7.6-root.io.3
  • @rootio/immutableRoot:npmall versions · fixed in 3.7.6-root.io.4
  • @rootio/immutableRoot:npmall versions · fixed in 3.8.3-root.io.1
  • @rootio/immutableRoot:npmall versions · fixed in 3.8.3-root.io.2
  • @rootio/immutableRoot:npmall versions · fixed in 4.0.0-rc.12-root.io.1

96 more package ranges on OSV.dev

Vendor advisories

  • CVE-2026-29063 Red Hat Product Security570 products fixed · 34 known affected

    immutable-js: Immutable.js: Arbitrary code execution via Prototype Pollution

    openshift-logging/logging-view-plugin-rhel9 as a component of Logging Subsystem for Red Hat OpenShift · mtv-candidate/mtv-console-plugin-rhel9 as a component of Migration Toolkit for Virtualization · network-observability/network-observability-console-plugin-compat-rhel9 as a component of Network Observability Operator · +31 more

  • RHSA-2026:83622 Red Hat Product Security68 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.17.28 security, enhancement & bug fix update

  • RHSA-2026:48085 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Red Hat Quay 3.18.0

  • RHSA-2026:40022 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.13.69 bug fix and security update

  • RHSA-2026:41944 Red Hat Product Security78 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.19.20 security, enhancement & bug fix update

  • RHSA-2026:41941 Red Hat Product Security68 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.18.25 security, enhancement & bug fix update

62 more advisories

Full record on NVD

Fix

  1. Update Redhat openshift container platform to 4.21.17 · 4.20.23 · 4.19.32 · 4.18.39 · 4.17.54 · 4.16.63 · 4.15.66 · 4.14.68
  2. Vendor fix Red Hat Product Security RHSA-2026:83622 · 68 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://docs.redhat.com/en/documentation/red_hat_openshift_data_foundation/4.17/html/updating_openshift_data_foundation/updating-ocs-…
  3. Vendor fix Red Hat Product Security RHSA-2026:48085 · 4 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  4. Vendor fix Red Hat Product Security RHSA-2026:40022 · 1 productFor OpenShift Container Platform 4.13 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
  5. Vendor fix Red Hat Product Security RHSA-2026:41944 · 78 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://docs.redhat.com/en/documentation/red_hat_openshift_data_foundation/4.19/html/updating_openshift_data_foundation/updating-ocs-…
  6. Vendor fix Red Hat Product Security RHSA-2026:41941 · 68 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://docs.redhat.com/en/documentation/red_hat_openshift_data_foundation/4.18/html/updating_openshift_data_foundation/updating-ocs-…
  7. Vendor fix Red Hat Product Security RHSA-2026:41928 · 1 productBefore applying this update, make sure all previously released errata relevant to your system have been applied.

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionnone2026-03-06
  • CNACVSS 4.08.7known since 2026-10-30
  • CNACVSS 3.18.8known since 2026-10-30
  • NVDCVSS 3.19.8read 2026-10-30
  • CNAweakness (CWE)CWE-1321, CWE-915known since 2026-10-30
  • FIRST EPSSEPSS score1.0 %2026-11-08
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryHIGH2026-03-04

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 4.0 vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
2026-03-06
Last Modified
2026-10-30
NVD status
Analyzed
GitHub Advisory
GHSA-wf6x-7x77-mvgw

Frequently asked questions

What is 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.

Is CVE-2026-29063 actively exploited?

Active exploitation of CVE-2026-29063 has not been confirmed. Its EPSS score was 1.0% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-29063?

CVE-2026-29063 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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