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Fencer Intel
high 7.5

CVE-2026-59879 json

Immutable.js `List` 32-bit trie overflow → unrecoverable DoS

published 4mo ago modified last mo. also EUVD-2026-42318 , GHSA-v56q-mh7h-f735

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits
0
none known

Summary

Immutable.js provides many Persistent Immutable data structures. Prior to 4.3.9 and 5.1.8, List#set, List#setSize, List#setIn, List#updateIn, and the functional set, setIn, and updateIn mishandle an index or size in the range 2 ** 30 to 2 ** 31 in setListBounds in src/List.js, causing an empty List to enter an uncatchable infinite loop, a populated List to allocate without bound until process abort, or setSize to silently wrap large values. This issue is fixed in versions 4.3.9 and 5.1.8.

Patch / fix

  • npm immutable 3.8.4, 4.3.9, 5.1.8
  • immutable-js immutable 4.3.9, 5.1.8
  • node-immutable Debian 14 4.3.9-1

debian advisories DEBIAN-CVE-2026-59879

  • foreman satellite utils 6.19, satellite capsule 6.19, satellite 6.19 3.18.0.14-1.el9sat
  • foreman-cli satellite utils 6.19, satellite 6.19 3.18.0.14-1.el9sat
  • foreman-ec2 satellite 6.19 3.18.0.14-1.el9sat
  • foreman-pcp satellite capsule 6.19, satellite 6.19 3.18.0.14-1.el9sat
  • foreman-redis satellite 6.19 3.18.0.14-1.el9sat
  • foreman-vmware satellite 6.19 3.18.0.14-1.el9sat
  • foreman-libvirt satellite 6.19 3.18.0.14-1.el9sat
  • foreman-service satellite 6.19 3.18.0.14-1.el9sat

red hat advisories RHSA-2026:74503

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-59879 updated cvss 5.3

immutable-js: Immutable.js: Denial of Service due to mishandling of large index values in List operations

  • Red Hat Logging Subsystem for Red Hat OpenShift openshift-logging/logging-view-plugin-rhel9
    affected: workaround, no fix available
  • Red Hat Migration Toolkit for Virtualization mtv-candidate/mtv-console-plugin-rhel9, migration-toolkit-virtualization/mtv-console-plugin-rhel9
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat Network Observability Operator network-observability/network-observability-console-plugin-rhel9, network-observability/network-observability-console-plugin-compat-rhel9 Red Hat Node HealthCheck Operator workload-availability/node-remediation-console-rhel8, workload-availability/node-remediation-console-rhel9, workload-availability/node-healthcheck-rhel9-operator, workload-availability/node-healthcheck-operator-bundle, workload-availability/node-healthcheck-must-gather-rhel9 Red Hat OpenShift Lightspeed openshift-lightspeed/lightspeed-console-plugin-rhel9, openshift-lightspeed/lightspeed-console-plugin-pf5-rhel9 Red Hat OpenShift Pipelines openshift-pipelines/pipelines-console-plugin-rhel8, openshift-pipelines/pipelines-console-plugin-rhel9 Red Hat OpenShift Service Mesh 2 openshift-service-mesh/kiali-rhel8, openshift-service-mesh/kiali-ossmc-rhel8
    affected: workaround, no fix available
  • Red Hat 3scale API Management Platform 2 3scale-amp2/system-rhel8 Red Hat Advanced Cluster Security 4 advanced-cluster-security/rhacs-main-rhel8
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Ansible Automation Platform 2 ansible-automation-platform/automation-dashboard-rhel9, ansible-automation-platform-tech-preview/automation-dashboard-rhel9
    affected: workaround, no fix available
  • Red Hat Connectivity Link 1 rhcl-1/rhcl-console-plugin-rhel9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Edge Manager 1 rhem/flightctl-ui-rhel9, rhem/flightctl-ui-ocp-rhel9
    affected: workaround, no fix available
  • Red Hat Enterprise Linux 10 subscription-manager-cockpit
    affected: workaround, no fix planned “Will not fix”
show 26 more
  • Red Hat OpenShift Container Platform 4 openshift4/ose-console, openshift4/ose-console-rhel9, openshift4/ose-monitoring-plugin-rhel8, openshift4/ose-monitoring-plugin-rhel9 Red Hat OpenShift Container Platform 5 openshift4/ose-console-rhel9, openshift5/ose-console-rhel9
    affected: workaround, no fix available
  • Red Hat OpenShift GitOps openshift-gitops-1/argocd-rhel8, openshift-gitops-1/argocd-rhel9, openshift-gitops-1/console-plugin-rhel8
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Satellite 6 nodejs-connected-react-router
    affected: workaround, no fix available
  • Red Hat Cryostat 4 on RHEL 9 cryostat/cryostat-grafana-dashboard-rhel9 4.2.0-19
    fixed: vendor fix RHSA-2026:95360
  • Red Hat multicluster engine for Kubernetes 2.6 multicluster-engine/console-mce-rhel9 1790117683
    fixed: vendor fix RHSA-2026:72850
  • Red Hat multicluster engine for Kubernetes 2.8 multicluster-engine/console-mce-rhel9 1790121310
    fixed: vendor fix RHSA-2026:72854
  • Red Hat multicluster engine for Kubernetes 2.9 multicluster-engine/console-mce-rhel9 1789583887
    fixed: vendor fix RHSA-2026:72851
  • Red Hat Advanced Cluster Management for Kubernetes 2.14 rhacm2/console-rhel9 1788563615
    fixed: vendor fix RHSA-2026:67539
  • Red Hat Ansible Automation Platform 2.1 ansible-automation-platform/automation-portal 1790254963
    fixed: vendor fix RHSA-2026:72712
  • Red Hat Container Native Virtualization 4.17 container-native-virtualization/kubevirt-console-plugin-rhel9 1793395171
    fixed: vendor fix RHSA-2026:93951
  • Red Hat Discovery 2 discovery/discovery-ui-rhel9 1789677459
    fixed: vendor fix RHSA-2026:69289
  • Red Hat Migration Toolkit 1.8 rhmtc/openshift-migration-ui-rhel8 1791853281
    fixed: vendor fix RHSA-2026:85846
  • Red Hat OpenShift AI 2.25 rhoai/odh-dashboard-rhel9 1791853525, rhoai/odh-mod-arch-model-registry-rhel9 1791853432
    fixed: vendor fix RHSA-2026:87410
  • Red Hat OpenShift Container Platform 4.19 openshift4/nmstate-console-plugin-rhel9 1790609954
    fixed: vendor fix RHSA-2026:74435
  • Red Hat OpenShift Container Platform 4.20 openshift4/nmstate-console-plugin-rhel9 1791962249
    fixed: vendor fix RHSA-2026:83503
  • Red Hat OpenShift Container Platform 4.21 openshift4/nmstate-console-plugin-rhel9 1790778086
    fixed: vendor fix RHSA-2026:74384
  • Red Hat Openshift Data Foundation 4.19 odf4/cephcsi-rhel9 1793125678, odf4/odf-cli-rhel9 1793126086, odf4/mcg-core-rhel9 1793125866, odf4/odf-console-rhel9 1793126829, odf4/mcg-rhel9-operator 1793125881, odf4/ocs-rhel9-operator 1793126016, +14 more
    fixed: vendor fix RHSA-2026:92650
  • Red Hat OpenShift Service Mesh 3.0 openshift-service-mesh/kiali-rhel9 1789024827, openshift-service-mesh/kiali-ossmc-rhel9 1789023352
    fixed: vendor fix RHSA-2026:68687
  • Red Hat OpenShift Service Mesh 3.1 openshift-service-mesh/kiali-rhel9 1789084585, openshift-service-mesh/kiali-ossmc-rhel9 1789023231
    fixed: vendor fix RHSA-2026:68689
  • Red Hat OpenShift Service Mesh 3.2 openshift-service-mesh/kiali-rhel9 1789022173, openshift-service-mesh/kiali-ossmc-rhel9 1789021821
    fixed: vendor fix RHSA-2026:68691
  • Red Hat Quay 3.9 quay/quay-rhel8 1790808443
    fixed: vendor fix RHSA-2026:77656
  • Red Hat Quay 3.10 quay/quay-rhel8 1791462428
    fixed: vendor fix RHSA-2026:79366
  • Red Hat Quay 3.12 quay/quay-rhel8 1791314514
    fixed: vendor fix RHSA-2026:79546
  • Red Hat Quay 3.16 quay/quay-rhel9 1789563753
    fixed: vendor fix RHSA-2026:69255
  • Red Hat Satellite 6.18 satellite/iop-vulnerability-frontend-rhel9 1789660969, satellite/iop-host-inventory-frontend-rhel9 1789613107
    fixed: vendor fix RHSA-2026:68756
  • Red Hat Satellite 6.19 for RHEL 9 foreman 3.18.0.14-1.el9sat, foreman-cli 3.18.0.14-1.el9sat, foreman-ec2 3.18.0.14-1.el9sat, foreman-pcp 3.18.0.14-1.el9sat, foreman-redis 3.18.0.14-1.el9sat, foreman-vmware 3.18.0.14-1.el9sat, +7 more
    fixed: vendor fix RHSA-2026:74503

26 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
4mo ago

Exploit prediction

0.58% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-11).

Exploits and checks

  • github.com https://github.com/immutable-js/immutable-js/security/advisories/GHSA-v56q-mh7h-f735 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
npm immutable
>=4.0.0-rc.1, <4.3.9
>=5.0.0-beta.1, <5.1.8
<3.8.4
4.3.9
5.1.8
3.8.4

Affected products

  • immutable-js immutable-js

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-835 Loop with Unreachable Exit Condition
  • CWE-1284 Improper Validation of Specified Quantity in Input

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of immutable-js/immutable-js published their own advisory on GitHub. Reviewed sources take precedence over it.