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Fencer Intel
critical 9.3

CVE-2026-44990 json

Apostrophe has default XSS via `xmp` raw-text passthrough in `sanitize-html`

published 5mo ago modified 14d ago also EUVD-2026-36566 , GHSA-rpr9-rxv7-x643

cvss
9.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. Under the default configuration, versions of `sanitize-html` prior to 2.17.4 can turn attacker-controlled content inside a disallowed `xmp` element into live HTML or JavaScript. This is a sanitizer bypass in the default `disallowedTagsMode: 'discard'` path and can lead to stored XSS in applications that render sanitized output back to users. Version 2.17.4 patches the issue.

Patch / fix

  • npm sanitize-html 2.17.4
  • Red Hat multicluster engine for Kubernetes 2.1 1784312384
  • Red Hat multicluster engine for Kubernetes 2.11 1786911977
  • Red Hat multicluster engine for Kubernetes 2.17 1786668856
  • Red Hat multicluster engine for Kubernetes 2.6 1783351002
  • Red Hat multicluster engine for Kubernetes 2.8 1785078604
  • Red Hat multicluster engine for Kubernetes 2.9 1783348181
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.11 1783350952
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.13 1785078581
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.14 1783451729
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.15 1784578812
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.16 1786908361
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 1787335105
  • Red Hat Red Hat Container Native Virtualization 4.19 1784844382
  • Red Hat Red Hat Container Native Virtualization 4.20 1784629964
  • Red Hat Red Hat OpenShift Container Platform 4.20 1788350963
  • Red Hat Red Hat OpenShift Container Platform 4.21 1788359934
  • Red Hat Red Hat OpenShift Container Platform 4.22 1787746382
  • Red Hat Red Hat OpenShift Dev Spaces 3.29 1784737150
  • Red Hat Red Hat Quay 3.10 1783750447
  • Red Hat Red Hat Quay 3.12 1783751865, 1784353904
  • Red Hat Red Hat Quay 3.15 1784351966
  • Red Hat Red Hat Quay 3.16 1783955846
  • Red Hat Red Hat Quay 3.9 1784125838
  • Red Hat Red Hat Satellite 6.18 1785922764
  • Red Hat Red Hat Satellite 6.19 1785937325, 1785956497
  • golang-github-prometheus-prometheus SLE Module for Package Hub 15 SP7 3.13.2-150100.4.40.2
  • grafana Multi Linux Manager Tools SLE-15 12.4.10-150002.4.27.1
  • mgr-push Multi Linux Manager Tools SLE-15 5.2.5-150002.3.12.1
  • spacecmd Multi Linux Manager Tools SLE-15 5.2.10-150002.3.15.1
  • uyuni-tools Multi Linux Manager Tools SLE-Micro-5, Multi Linux Manager Tools SLE-15 5.2.17-150002.3.20.1
  • venv-salt-minion Multi Linux Manager Tools SLE-Micro-5, Multi Linux Manager Tools SLE-15 3006.0-150002.5.22.1
  • spacewalk-client-tools Multi Linux Manager Tools SLE-15 5.2.7-150002.3.12.1
  • golang-github-prometheus-prometheus Multi Linux Manager Tools SLE-15 3.13.2-150002.3.19.1

suse advisories SUSE-SU-2026:4606-1SUSE-SU-2026:4585-1

  • golang-github-prometheus-prometheus openSUSE Tumbleweed 3.13.2-1.1

opensuse advisories openSUSE-SU-2026:11436-1

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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-2026-44990 updated cvss 8.1

sanitize-html: `sanitize-html`: Stored Cross-Site Scripting via HTML sanitizer bypass

  • Red Hat OpenShift AI (RHOAI) rhoai/odh-mlflow-rhel9 Red Hat OpenShift Container Platform 4 openshift4/ose-agent-installer-ui-rhel9 Red Hat OpenShift Container Platform 5 openshift5/ose-agent-installer-ui-rhel9 Red Hat Satellite 6 satellite/iop-advisor-frontend-rhel9
    affected: workaround, no fix available
  • Red Hat multicluster engine for Kubernetes 2.6 multicluster-engine/console-mce-rhel9 1783351002
    fixed: vendor fix RHSA-2026:41055
  • Red Hat multicluster engine for Kubernetes 2.8 multicluster-engine/console-mce-rhel9 1785078604
    fixed: vendor fix RHSA-2026:47735
  • Red Hat multicluster engine for Kubernetes 2.9 multicluster-engine/console-mce-rhel9 1783348181
    fixed: vendor fix RHSA-2026:36883
  • Red Hat multicluster engine for Kubernetes 2.10 multicluster-engine/console-mce-rhel9 1784312384
    fixed: vendor fix RHSA-2026:46885
  • Red Hat multicluster engine for Kubernetes 2.11 multicluster-engine/console-mce-rhel9 1786911977
    fixed: vendor fix RHSA-2026:57194
  • Red Hat multicluster engine for Kubernetes 2.17 multicluster-engine/console-mce-rhel9 1786668856
    fixed: vendor fix RHSA-2026:59593
  • Red Hat Advanced Cluster Management for Kubernetes 2.11 rhacm2/console-rhel9 1783350952
    fixed: vendor fix RHSA-2026:41064
show 29 more
  • Red Hat Advanced Cluster Management for Kubernetes 2.13 rhacm2/console-rhel9 1785078581
    fixed: vendor fix RHSA-2026:47737
  • Red Hat Advanced Cluster Management for Kubernetes 2.14 rhacm2/console-rhel9 1783451729
    fixed: vendor fix RHSA-2026:36882
  • Red Hat Advanced Cluster Management for Kubernetes 2.15 rhacm2/console-rhel9 1784578812
    fixed: vendor fix RHSA-2026:46903
  • Red Hat Advanced Cluster Management for Kubernetes 2.16 rhacm2/console-rhel9 1786908361
    fixed: vendor fix RHSA-2026:57191
  • Red Hat Advanced Cluster Management for Kubernetes 2.17 rhacm2/console-rhel9 1787335105
    fixed: vendor fix RHSA-2026:60386
  • Red Hat Container Native Virtualization 4.19 container-native-virtualization/kubevirt-console-plugin-rhel9 1784844382
    fixed: vendor fix RHSA-2026:46685
  • Red Hat Container Native Virtualization 4.20 container-native-virtualization/kubevirt-console-plugin-rhel9 1784629964
    fixed: vendor fix RHSA-2026:46598
  • Red Hat OpenShift Container Platform 4.12 openshift4/ose-console 1791245342
    fixed: vendor fix RHSA-2026:77316
  • Red Hat OpenShift Container Platform 4.13 openshift4/ose-console 1791299243
    fixed: vendor fix RHSA-2026:77321
  • Red Hat OpenShift Container Platform 4.14 openshift4/ose-console 1790606051
    fixed: vendor fix RHSA-2026:73869
  • Red Hat OpenShift Container Platform 4.15 openshift4/ose-console 1791836468
    fixed: vendor fix RHSA-2026:82813
  • Red Hat OpenShift Container Platform 4.16 openshift4/ose-console-rhel9 1789453727
    fixed: vendor fix RHSA-2026:67936
  • Red Hat OpenShift Container Platform 4.17 openshift4/ose-console-rhel9 1789939565
    fixed: vendor fix RHSA-2026:70587
  • Red Hat OpenShift Container Platform 4.18 openshift4/ose-console-rhel9 1789904865
    fixed: vendor fix RHSA-2026:70617
  • Red Hat OpenShift Container Platform 4.19 openshift4/ose-console-rhel9 1788573287
    fixed: vendor fix RHSA-2026:66371
  • Red Hat OpenShift Container Platform 4.20 openshift4/ose-console-rhel9 1788350963
    fixed: vendor fix RHSA-2026:63103
  • Red Hat OpenShift Container Platform 4.21 openshift4/ose-console-rhel9 1788359934
    fixed: vendor fix RHSA-2026:63046
  • Red Hat OpenShift Container Platform 4.22 openshift4/ose-console-rhel9 1787746382
    fixed: vendor fix RHSA-2026:60441
  • Red Hat OpenShift Dev Spaces 3.29 devspaces/dashboard-rhel9 1784737150
    fixed: vendor fix RHSA-2026:48124
  • Red Hat Quay 3.9 quay/quay-rhel8 1784125838
    fixed: vendor fix RHSA-2026:40262
  • Red Hat Quay 3.10 quay/quay-rhel8 1783750447
    fixed: vendor fix RHSA-2026:41031
  • Red Hat Quay 3.12 quay/quay-rhel8 1783751865, quay/quay-rhel8 1784353904
    fixed: vendor fix RHSA-2026:42146
  • Red Hat Quay 3.14 quay/quay-rhel8 1788593843
    fixed: vendor fix RHSA-2026:70267
  • Red Hat Quay 3.15 quay/quay-rhel8 1784351966
    fixed: vendor fix RHSA-2026:42796
  • Red Hat Quay 3.16 quay/quay-rhel9 1783955846
    fixed: vendor fix RHSA-2026:41066
  • Red Hat Quay 3.17 quay/quay-rhel9 1786181981
    fixed: vendor fix RHSA-2026:54395
  • Red Hat Satellite 6.18 satellite/iop-host-inventory-frontend-rhel9 1785922764
    fixed: vendor fix RHSA-2026:51349
  • Red Hat Satellite 6.19 satellite/iop-vulnerability-frontend-rhel9 1785937325, satellite/iop-host-inventory-frontend-rhel9 1785956497
    fixed: vendor fix RHSA-2026:51196
  • Red Hat multicluster engine for Kubernetes 2.6 multicluster-engine/hive-rhel9 1783724179, multicluster-engine/work-rhel9 1783986742, multicluster-engine/discovery-rhel9 1783985999, multicluster-engine/placement-rhel9 1783986737, multicluster-engine/must-gather-rhel9 1783985963, multicluster-engine/registration-rhel9 1783260551, +20 more
    not affected: vulnerable code not present

33 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
total
Assessed
4mo ago

Exploit prediction

0.68% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-rpr9-rxv7-x643 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 9.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
CISA ADP 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
GitHub 3.1 9.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
npm sanitize-html
>=2.17.3, <2.17.4
2.17.4

Affected products

  • apostrophecms sanitize-html
  • Red Hat multicluster engine for Kubernetes 2.1
  • Red Hat multicluster engine for Kubernetes 2.11
  • Red Hat multicluster engine for Kubernetes 2.17
  • Red Hat multicluster engine for Kubernetes 2.6
  • Red Hat multicluster engine for Kubernetes 2.8
  • Red Hat multicluster engine for Kubernetes 2.9
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.11
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.13
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.14
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.15
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.16
  • Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17
  • Red Hat Red Hat Container Native Virtualization 4.19
  • Red Hat Red Hat Container Native Virtualization 4.20
  • Red Hat Red Hat OpenShift Container Platform 4.20
  • Red Hat Red Hat OpenShift Container Platform 4.21
  • Red Hat Red Hat OpenShift Container Platform 4.22
  • Red Hat Red Hat OpenShift Dev Spaces 3.29
  • Red Hat Red Hat Quay 3.10
  • Red Hat Red Hat Quay 3.12
  • Red Hat Red Hat Quay 3.15
  • Red Hat Red Hat Quay 3.16
  • Red Hat Red Hat Quay 3.9
  • Red Hat Red Hat Satellite 6.18
  • Red Hat Red Hat Satellite 6.19
  • Red Hat Red Hat Hardened Images
  • Red Hat Red Hat OpenShift AI (RHOAI)
  • Red Hat Red Hat OpenShift Container Platform 4
  • Red Hat Red Hat Satellite 6

Classification

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

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.

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