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Fencer Vulns
high 7.5

CVE-2026-32141 json

flatted: Unbounded recursion DoS in parse() revive phase

published 2026-03-12 7 mo ago modified 2026-09-10 1 mo ago also GHSA-25h7-pfq9-p65f , EUVD-2026-11653

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits
0
none known

Summary

flatted is a circular JSON parser. Prior to 3.4.0, flatted's parse() function uses a recursive revive() phase to resolve circular references in deserialized JSON. When given a crafted payload with deeply nested or self-referential $ indices, the recursion depth is unbounded, causing a stack overflow that crashes the Node.js process. This vulnerability is fixed in 3.4.0.

Patch / fix

  • npm flatted 3.4.0
  • Red Hat Cluster Observability Operator 1.5.0 1782839279, 1782839996, 1782840539
  • Red Hat Red Hat Developer Hub 1.8 1776784286
  • Red Hat Red Hat Developer Hub 1.9 1777903262
  • Red Hat Red Hat Edge Manager 1.0 1783502438, 1783502765
  • Red Hat Red Hat Edge Manager 1.1 1784126822, 1784127736, 1784194574, 1784194938
  • Red Hat Red Hat OpenShift AI 2.16 1774282136
  • Red Hat Red Hat OpenShift Dev Spaces 3.28 1779341289
  • node-flatted Debian 14 3.4.1~ds-1

debian advisories DEBIAN-CVE-2026-32141

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-2026-32141 updated cvss 7.5

flatted: flatted: Unbounded recursion DoS in parse() revive phase

  • Red Hat Logging Subsystem for Red Hat OpenShift openshift-logging/kibana6-rhel8, openshift-logging/elasticsearch6-rhel9, openshift-logging/logging-curator5-rhel9, openshift-logging/elasticsearch-proxy-rhel9, openshift-logging/elasticsearch-rhel9-operator, openshift-logging/elasticsearch-operator-bundle Red Hat 3scale API Management Platform 2 3scale-amp20/system, 3scale-amp21/system, 3scale-amp22/system, 3scale-amp24/system, 3scale-amp25/system, 3scale-amp26/system, +2 more
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Ansible Automation Platform 2 ansible-on-clouds/aoc-azure-aap-installer-rhel9 Red Hat build of Apicurio Registry 2 io.apicurio-apicurio-registry Red Hat Data Grid 8 org.infinispan-infinispan-console
    affected: workaround, no fix available
  • Red Hat Fuse 7 io.syndesis-syndesis-parent
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Single Sign-On 7 org.keycloak-keycloak-parent
    affected: workaround, no fix available
  • Red Hat streams for Apache Kafka 2 com.github.streamshub-console Red Hat streams for Apache Kafka 3 com.github.streamshub-console
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Cluster Observability Operator 1.5 cluster-observability-operator/logging-console-plugin-pf4-rhel9 1782839279, cluster-observability-operator/logging-console-plugin-pf5-rhel9 1782840539, cluster-observability-operator/troubleshooting-panel-console-plugin-pf6-rhel9 1782839996
    fixed: vendor fix RHSA-2026:34342
  • Red Hat Ceph Storage 9.2 rhceph/rhceph-9-rhel10 1790843527
    fixed: vendor fix RHSA-2026:86618
  • Red Hat Developer Hub 1.8 rhdh 1776784286
    fixed: vendor fix RHSA-2026:9742
show 15 more
  • Red Hat Developer Hub 1.9 rhdh 1777903262
    fixed: vendor fix RHSA-2026:13826
  • Red Hat Edge Manager 1.0 rhem/flightctl-ui-rhel9 1783502438, rhem/flightctl-ui-ocp-rhel9 1783502765
    fixed: vendor fix RHSA-2026:36651
  • Red Hat Edge Manager 1.1 rhem/flightctl-ui-rhel9 1784127736, rhem/flightctl-ui-rhel10 1784194574, rhem/flightctl-ui-ocp-rhel9 1784126822, rhem/flightctl-ui-ocp-rhel10 1784194938
    fixed: vendor fix RHSA-2026:40945
  • Red Hat OpenShift AI 2.16 rhoai 1774282136
    fixed: vendor fix RHSA-2026:5807
  • Red Hat OpenShift Dev Spaces 3.28 devspaces/dashboard-rhel9 1779341289
    fixed: vendor fix RHSA-2026:21772
  • Red Hat Cluster Observability Operator 1.5 cluster-observability-operator/perses-rhel9 1782839109, cluster-observability-operator/thanos-rhel9 1782840280, cluster-observability-operator/korrel8r-rhel9 1782839157, cluster-observability-operator/prometheus-rhel9 1782840780, cluster-observability-operator/alertmanager-rhel9 1782840761, cluster-observability-operator/perses-rhel9-operator 1782839191, +16 more
    not affected: vulnerable code not present
  • Red Hat Cryostat 4 io.cryostat-cryostat
    not affected: component not present
  • Red Hat 3scale API Management Platform 2 3scale-amp2/system-rhel8
    not affected: vulnerable code not present
  • Red Hat AMQ Broker 7 org.jolokia-jolokia-parent Red Hat build of OptaPlanner 8 org.optaweb.vehiclerouting-optaweb-vehicle-routing
    not affected: component not present
  • Red Hat Ceph Storage 9.2 rhceph/alloy-rhel10 1790774976, rhceph/grafana-rhel10 1790774121, rhceph/keepalived-rhel10 1790842990, rhceph/oauth2-proxy-rhel10 1790774021, rhceph/snmp-notifier-rhel10 1790773439, rhceph/rhceph-haproxy-rhel10 1790846345 Red Hat Developer Hub 1.8 rhdh 1776783947, rhdh 1776787729 Red Hat Developer Hub 1.9 rhdh 1777902709, rhdh 1777909942 Red Hat Directory Server 11 389-ds-base Red Hat Directory Server 12 389-ds-base Red Hat Directory Server 13 389-ds-base
    +2 more products
    Red Hat Edge Manager 1.0 rhem/flightctl-api-rhel9 1783502025, rhem/flightctl-worker-rhel9 1783502445, rhem/flightctl-db-setup-rhel9 1783502401, rhem/flightctl-periodic-rhel9 1783502022, rhem/flightctl-pam-issuer-rhel9 1783502403, rhem/flightctl-cli-artifacts-rhel9 1783502494, +4 more Red Hat Edge Manager 1.1 rhem/flightctl-api-rhel9 1784126780, rhem/flightctl-api-rhel10 1784196588, rhem/flightctl-worker-rhel9 1784127775, rhem/flightctl-worker-rhel10 1784194971, rhem/flightctl-db-setup-rhel9 1784126762, rhem/flightctl-periodic-rhel9 1784127791, +18 more
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 8 pcs, grafana, pcs-snmp, grafana-loki, grafana-mssql, grafana-mysql, +10 more Red Hat Enterprise Linux 9 pcs, grafana, pcs-snmp, grafana-selinux
    not affected: vulnerable code not in execute path
  • Red Hat JBoss Enterprise Application Platform 7 org.jboss.hal-hal-parent Red Hat JBoss Enterprise Application Platform 8 org.keycloak-keycloak-parent Red Hat JBoss Enterprise Application Platform Expansion Pack org.keycloak-keycloak-parent Red Hat OpenShift AI (RHOAI) rhoai/odh-mlflow-rhel9, rhoai/odh-data-science-pipelines-argo-argoexec-rhel8, rhoai/odh-data-science-pipelines-argo-workflowcontroller-rhel8 Red Hat OpenShift AI 2.16 rhoai 1774282058, rhoai 1774282073, rhoai 1774282078, rhoai 1774282087, rhoai 1774282092, rhoai 1774282093, +19 more
    not affected: vulnerable code not present
  • Red Hat OpenShift Container Platform 4 openshift4/ose-console, openshift4/ose-console-rhel9
    not affected: vulnerable code not in execute path
  • Red Hat OpenShift Dev Spaces 3.28 devspaces/udi-rhel9 1779829736, devspaces/code-rhel9 1779814592, devspaces/server-rhel9 1779342423, devspaces/openvsx-rhel9 1779528224, devspaces/traefik-rhel9 1779786779, devspaces/udi-base-rhel9 1779741066, +9 more
    not affected: vulnerable code not present
  • Red Hat Process Automation 7 org.uberfire-uberfire-parent, org.kie.workbench-kie-wb-common, org.kie-process-migration-service
    not affected: component not present

1 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
7 mo ago

Exploit prediction

0.90% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/WebReflection/flatted/security/advisories/GHSA-25h7-pfq9-p65f referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 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 flatted
<3.4.0
3.4.0

Affected products

  • WebReflection flatted
  • Red Hat Cluster Observability Operator 1.5.0
  • Red Hat Red Hat Developer Hub 1.8
  • Red Hat Red Hat Developer Hub 1.9
  • Red Hat Red Hat Edge Manager 1.0
  • Red Hat Red Hat Edge Manager 1.1
  • Red Hat Red Hat OpenShift AI 2.16
  • Red Hat Red Hat OpenShift Dev Spaces 3.28
  • Red Hat Cryostat 4
  • Red Hat Logging Subsystem for Red Hat OpenShift
  • Red Hat Red Hat 3scale API Management Platform 2
  • Red Hat Red Hat AMQ Broker 7
  • Red Hat Red Hat Ansible Automation Platform 2
  • Red Hat Red Hat build of Apicurio Registry 2
  • Red Hat Red Hat build of OptaPlanner 8
  • Red Hat Red Hat Data Grid 8
  • Red Hat Red Hat Directory Server 11
  • Red Hat Red Hat Directory Server 12
  • Red Hat Red Hat Directory Server 13
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Fuse 7
  • Red Hat Red Hat JBoss Enterprise Application Platform 7
  • Red Hat Red Hat JBoss Enterprise Application Platform 8
  • Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack
  • Red Hat Red Hat OpenShift AI (RHOAI)
  • Red Hat Red Hat OpenShift Container Platform 4
  • Red Hat Red Hat Process Automation 7
  • Red Hat Red Hat Quay 3
  • Red Hat Red Hat Single Sign-On 7
  • Red Hat streams for Apache Kafka 2
  • Red Hat streams for Apache Kafka 3

Classification

Weakness
  • CWE-674 Uncontrolled Recursion
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Vulns 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.