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Fencer Vulns
medium 6.1

CVE-2026-49978 json

DOMPurify IN_PLACE Sanitization Bypass via Attached Shadow Root Inside <template>.content

published 2026-06-15 4 mo ago modified 2026-10-24 15 d ago also EUVD-2026-44452 , GHSA-rp9w-3fw7-7cwq

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 34%
public exploits
0
none known

Summary

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.7, DOMPurify IN_PLACE sanitization could skip shadow contents attached to an element inside <template>.content, allowing attacker-controlled markup such as event handlers, JavaScript URLs, or scripts to survive and execute when an application cloned and inserted the sanitized template. This issue is fixed in version 3.4.7.

Patch / fix

  • npm dompurify 3.4.7
  • cure53 dompurify 3.4.6
  • node-dompurify Debian 14 3.4.12+dfsg-1

debian advisories DEBIAN-CVE-2026-49978

  • rh-podman-desktop RHEL 10.2 1.1.2-1.el10_2

red hat advisories RHSA-2026:57590

  • argocd-cli openSUSE Tumbleweed 3.6.1-1.1

opensuse advisories openSUSE-SU-2026:12452-1

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-2026-49978 updated cvss 8.1

dompurify: DOMPurify: Cross-site scripting vulnerability allows code execution

  • Red Hat Cryostat 4 grafana-infinity-datasource-npm Red Hat Migration Toolkit for Virtualization migration-toolkit-virtualization/mtv-console-plugin-rhel9 Red Hat Node HealthCheck Operator workload-availability/node-healthcheck-rhel9-operator, workload-availability/node-healthcheck-operator-bundle, workload-availability/node-healthcheck-must-gather-rhel9
    affected: no fix available
  • Red Hat Ansible Automation Platform 2 automation-gateway, automation-platform-ui, automation-eda-controller
    affected: no fix available, no fix planned “Will not fix”
  • Red Hat build of Apache Camel - HawtIO 4 dompurify Red Hat Build of Podman Desktop rh-podman-desktop.git
    affected: no fix available
  • Red Hat Ceph Storage 9 rhceph/alloy-rhel10
    affected: no fix available “Fix deferred”
  • Red Hat OpenShift Container Platform 5 openshift5/ose-agent-installer-ui-rhel9
    affected: no fix available
  • Red Hat Openshift Data Foundation 4 odf4/odf-console-rhel9, odf4/odf-multicluster-console-rhel9
    affected: no fix available “Fix deferred”
  • Red Hat OpenShift GitOps openshift-gitops-1/argocd-rhel8, openshift-gitops-1/argocd-rhel9
    affected: no fix available
  • Red Hat Cryostat 4 on RHEL 9 cryostat/cryostat-grafana-dashboard-rhel9 4.2.0-19, cryostat/cryostat-openshift-console-plugin-rhel9 4.2.0-14
    fixed: vendor fix RHSA-2026:95360
show 29 more
  • Red Hat Advanced Cluster Security 4.9 advanced-cluster-security/rhacs-main-rhel8 1785413210
    fixed: vendor fix RHSA-2026:48872
  • Red Hat Advanced Cluster Security for Kubernetes 4.11 advanced-cluster-security/rhacs-main-rhel9 1785415868
    fixed: vendor fix RHSA-2026:48891
  • Red Hat Advanced Cluster Security for Kubernetes for IBM Power, little endian 4.10 advanced-cluster-security/rhacs-main-rhel8 1785420959
    fixed: vendor fix RHSA-2026:48913
  • Red Hat AMQ Broker 7.13.6
    fixed: vendor fix RHSA-2026:66545
  • Red Hat AMQ Broker 7.14.1
    fixed: vendor fix RHSA-2026:66488
  • Red Hat Ansible Automation Platform 2.2 ansible-automation-platform/automation-portal 1784622951
    fixed: vendor fix RHSA-2026:42815
  • Red Hat build of Apicurio Registry 3.3.1
    fixed: vendor fix RHSA-2026:59360
  • Red Hat Container Native Virtualization 4.12 container-native-virtualization/kubevirt-console-plugin 1784710594
    fixed: vendor fix RHSA-2026:46623
  • Red Hat Container Native Virtualization 4.13 container-native-virtualization/kubevirt-console-plugin-rhel9 1786327570
    fixed: vendor fix RHSA-2026:53735
  • Red Hat Container Native Virtualization 4.14 container-native-virtualization/kubevirt-console-plugin-rhel9 1784741686
    fixed: vendor fix RHSA-2026:46539
  • Red Hat Container Native Virtualization 4.15 container-native-virtualization/kubevirt-console-plugin-rhel9 1786328346
    fixed: vendor fix RHSA-2026:53840
  • Red Hat Container Native Virtualization 4.17 container-native-virtualization/kubevirt-console-plugin-rhel9 1784805322
    fixed: vendor fix RHSA-2026:46558
  • Red Hat Container Native Virtualization 4.22 container-native-virtualization/kubevirt-console-plugin-rhel9 1784634128
    fixed: vendor fix RHSA-2026:43625
  • Red Hat Data Grid 8.6.3
    fixed: vendor fix RHSA-2026:69296
  • Red Hat Developer Hub 1.9 rhdh/rhdh-hub-rhel9 1785972843
    fixed: vendor fix RHSA-2026:52768
  • Red Hat Developer Hub 1.10 rhdh/rhdh-hub-rhel9 1785411652, rhdh/red-hat-developer-hub-backstage-plugin-lightspeed 1785333413
    fixed: vendor fix RHSA-2026:48126
  • Red Hat Enterprise Linux Extensions Channel (v. 10) rh-podman-desktop 1.1.2-1.el10_2
    fixed: vendor fix RHSA-2026:57590
  • Red Hat OpenShift AI 2.25 rhoai/odh-dashboard-rhel9 1788312226, rhoai/odh-mod-arch-model-registry-rhel9 1788312157
    fixed: vendor fix RHSA-2026:65126
  • Red Hat OpenShift AI 3.4 rhoai/odh-dashboard-rhel9 1787347991, rhoai/odh-mod-arch-maas-rhel9 1787251250, rhoai/odh-mod-arch-automl-rhel9 1787250508, rhoai/odh-mod-arch-gen-ai-rhel9 1786611759, rhoai/odh-mod-arch-autorag-rhel9 1787251550, rhoai/odh-mod-arch-eval-hub-rhel9 1791861214, +1 more
    fixed: vendor fix RHSA-2026:60520
  • Red Hat OpenShift Container Platform 4.19 openshift4/ose-monitoring-plugin-rhel9 1785517933
    fixed: vendor fix RHSA-2026:51007
  • Red Hat OpenShift Container Platform 4.20 openshift4/ose-monitoring-plugin-rhel9 1785349166
    fixed: vendor fix RHSA-2026:48676
  • Red Hat OpenShift Container Platform 4.21 openshift4/ose-monitoring-plugin-rhel9 1785354128
    fixed: vendor fix RHSA-2026:48670
  • Red Hat OpenShift Container Platform 4.22 openshift4/ose-monitoring-plugin-rhel9 1785230041, openshift4/ose-agent-installer-ui-rhel9 1785230147
    fixed: vendor fix RHSA-2026:48693
  • Red Hat OpenShift Dev Spaces 3.30 devspaces/code-rhel9 1787762793, devspaces/openvsx-rhel9 1787759145
    fixed: vendor fix RHSA-2026:62260
  • Red Hat OpenShift Service Mesh 3.3 openshift-service-mesh/kiali-rhel9 1784806326, openshift-service-mesh/kiali-ossmc-rhel9 1784824388
    fixed: vendor fix RHSA-2026:49680
  • Red Hat OpenShift Service Mesh 3.4 openshift-service-mesh/kiali-rhel9 1784806708, openshift-service-mesh/kiali-ossmc-rhel9 1784824894
    fixed: vendor fix RHSA-2026:49735
  • Red Hat Streams for Apache Kafka 3.2.1
    fixed: vendor fix RHSA-2026:54435
  • Red Hat Cryostat 4 dompurify
    not affected: component not present
  • Red Hat Cryostat 4 on RHEL 9 cryostat/cryostat-rhel9 4.2.0-14, cryostat/cryostat-rhel9 4.2.0-18, cryostat/cryostat-db-rhel9 4.2.0-22, cryostat/cryostat-db-rhel9 4.2.0-29, cryostat/jfr-datasource-rhel9 4.2.0-14, cryostat/jfr-datasource-rhel9 4.2.0-19, +12 more
    not affected: vulnerable code not present

28 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
no
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/cure53/DOMPurify/security/advisories/GHSA-rp9w-3fw7-7cwq referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 6.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
CNA 4.0 6.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/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 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
npm dompurify
<3.4.7
3.4.7

Affected products

  • cure53 DOMPurify

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.