--- id: CVE-2026-44990 title: >- ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API 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-contro… severity: critical cvss: 9.3 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N' cwe: - CWE-79 vendor: apostrophecms product: sanitize-html affected: - sanitize-html < 2.17.4 patched: - advanced_cluster_management_for_kubernetes 2.11 - advanced_cluster_management_for_kubernetes 2.13 - advanced_cluster_management_for_kubernetes 2.14 - advanced_cluster_management_for_kubernetes 2.15 - advanced_cluster_management_for_kubernetes 2.16 - advanced_cluster_management_for_kubernetes 2.17 - container_native_virtualization 4.19 - container_native_virtualization 4.20 - openshift_container_platform 4.22 - openshift_dev_spaces 3.29 - quay 3.12 - quay 3.15 - quay 3.16 - quay 3.1 - quay 3.9 - satellite 6.18 - satellite 6.19 - multicluster_engine_for_kubernetes 2.11 - multicluster_engine_for_kubernetes 2.17 - multicluster_engine_for_kubernetes 2.1 - multicluster_engine_for_kubernetes 2.6 - multicluster_engine_for_kubernetes 2.8 - multicluster_engine_for_kubernetes 2.9 published: '2026-06-12' updated: '2026-09-10' sourceUpdated: '2026-09-10T13:20:17.020' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-44990' references: - url: >- https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-rpr9-rxv7-x643 label: security-advisories@github.com - url: 'https://access.redhat.com/errata/RHSA-2026:36882' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:36883' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:40262' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:41031' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:41055' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:41064' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:41066' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:42146' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:42796' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:43052' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:46598' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:46685' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:46885' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:46903' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:47735' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:47737' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:48124' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:51196' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:51197' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:51349' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:57191' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:57194' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:59593' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:60386' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:60441' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:63046' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:63103' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/security/cve/CVE-2026-44990' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2488565' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: >- https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-rpr9-rxv7-x643 label: 134c704f-9b21-4f2e-91b3-4a467353bcc0 - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44990.json label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:40119' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:40138' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://www.cve.org/CVERecord?id=CVE-2026-44990' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-44990' tags: - nvd - cve.org - exploit-available - csaf - vex - red-hat exploitAvailable: true ssvc: exploitation: poc automatable: 'no' technicalImpact: total timestamp: '2026-06-15T13:04:32.468259Z' epss: 0.00695 epssPercentile: 0.50928 scores: nvd: 9.3 vendor: 8.1 cna: 9.3 ingestedAt: '2026-07-16T14:55:12.373Z' --- ## Overview 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. ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges. ## Vendor advisories - **RHSA-2026:41064** · Red Hat · fixed in: Red Hat Advanced Cluster Management for Kubernetes 2.11 · released 2026-07-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:41064) - **RHSA-2026:47737** · Red Hat · fixed in: Red Hat Advanced Cluster Management for Kubernetes 2.13 · released 2026-07-29 · [advisory](https://access.redhat.com/errata/RHSA-2026:47737) - **RHSA-2026:36882** · Red Hat · fixed in: Red Hat Advanced Cluster Management for Kubernetes 2.14 · released 2026-07-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:36882) - **RHSA-2026:46903** · Red Hat · fixed in: Red Hat Advanced Cluster Management for Kubernetes 2.15 · released 2026-07-27 · [advisory](https://access.redhat.com/errata/RHSA-2026:46903) - **RHSA-2026:57191** · Red Hat · fixed in: Red Hat Advanced Cluster Management for Kubernetes 2.16 · released 2026-08-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:57191) - **RHSA-2026:60386** · Red Hat · fixed in: Red Hat Advanced Cluster Management for Kubernetes 2.17 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:60386) - **RHSA-2026:46685** · Red Hat · fixed in: Red Hat Container Native Virtualization 4.19 · released 2026-07-27 · [advisory](https://access.redhat.com/errata/RHSA-2026:46685) - **RHSA-2026:46598** · Red Hat · fixed in: Red Hat Container Native Virtualization 4.20 · released 2026-07-27 · [advisory](https://access.redhat.com/errata/RHSA-2026:46598) - **RHSA-2026:60441** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.22 · released 2026-09-01 · [advisory](https://access.redhat.com/errata/RHSA-2026:60441) - **RHSA-2026:48124** · Red Hat · fixed in: Red Hat OpenShift Dev Spaces 3.29 · released 2026-07-29 · [advisory](https://access.redhat.com/errata/RHSA-2026:48124) - **RHSA-2026:42146** · Red Hat · fixed in: Red Hat Quay 3.12 · released 2026-07-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:42146) - **Red Hat VEX** · Important · affected: Red Hat OpenShift AI (RHOAI), Red Hat OpenShift Container Platform 4, Red Hat Satellite 6 · no fix planned: Red Hat OpenShift AI (RHOAI), Red Hat OpenShift Container Platform 4, Red Hat Satellite 6 · updated 2026-09-08 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44990.json)