Cross-site scripting in cure53 DOMPurify
Priority MEDIUM 60CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Partial Red Hat: 11 fixed, 19 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-79.
Summary
DOMPurify before 3.2.4 has an incorrect template literal regular expression, sometimes leading to mutation cross-site scripting (mXSS).
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00605 49th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Partial DOMPurify (Cure53): 3.2.4dompurify (npm): 3.2.4Red Hat: 11 advisoriesRed Hat: 11 fixed, 19 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| cure53 | DOMPurify | before 3.2.4 | 3.2.4 | Patch available | CNA |
| — | dompurify (npm) | before 3.2.4 | 3.2.4 | Patch available | GHSA-vhxf-7vqr-mrjg |
- DOMPurify Vendorcure53 Affected before 3.2.4 Fixed in 3.2.4 Patch available CNA
- dompurify (npm) Vendor— Affected before 3.2.4 Fixed in 3.2.4 Patch available GHSA-vhxf-7vqr-mrjg
Remediation
- Fix · CNA DOMPurify (Cure53) Fixed in 3.2.4
- Fix · GHSA-vhxf-7vqr-mrjg dompurify (npm) Fixed in 3.2.4 Advisory →
Red Hat 11 advisories
- RHSA-2026:86618 Released 2026-10-21 · Red Hat rating CriticalNew container image: rhceph-9.2
- Red Hat Ceph Storage 9.2 registry.redhat.io/rhceph/rhceph-9-rhel10
- RHSA-2026:3406 Released 2026-02-26 · Red Hat rating ImportantNew container image: rhceph-9.0
- Red Hat Ceph Storage 9 registry.redhat.io/rhceph/grafana-rhel10, registry.redhat.io/rhceph/rhceph-9-rhel9
- RHSA-2026:2769 Released 2026-02-17 · Red Hat rating ImportantRed Hat Ceph Storage 7.1 security and bug fix updates
- Red Hat Ceph Storage 7.1 Tools ceph-2:18.2.1-381.el8cp, ceph-2:18.2.1-381.el9cp, ceph-base-2:18.2.1-381.el8cp +47
Show 8 more Red Hat advisories
- RHSA-2026:2737 Released 2026-02-16 · Red Hat rating ImportantRed Hat Ceph Storage
- Red Hat Ceph Storage 8 registry.redhat.io/rhceph/grafana-rhel9, registry.redhat.io/rhceph/rhceph-8-rhel9
- RHSA-2025:10020 Released 2025-07-01 · Red Hat rating ModerateNetwork Observability 1.9.0 for OpenShift
- Red Hat Openshift Network Observability 1.9.3 registry.redhat.io/network-observability/network-observability-console-plugin-rhel9
- RHSA-2025:7626 Released 2025-05-14 · Red Hat rating ImportantRed Hat Developer Hub 1.6.0 release.
- Red Hat Developer Hub 1.6 registry.redhat.io/rhdh/rhdh-hub-rhel9
- RHSA-2025:3886 Released 2025-04-15 · Red Hat rating ImportantRHOAI 2.19.0 - Red Hat OpenShift AI
- Red Hat OpenShift AI 2.19 registry.redhat.io/rhoai/odh-dashboard-rhel8, registry.redhat.io/rhoai/odh-model-controller-rhel8, registry.redhat.io/rhoai/odh-modelmesh-runtime-adapter-rhel8
- RHSA-2025:3397 Released 2025-03-31 · Red Hat rating ImportantRHOAI 2.16.0 - Red Hat OpenShift AI
- Red Hat OpenShift AI 2.16 registry.redhat.io/rhoai/odh-codeflare-operator-rhel8, registry.redhat.io/rhoai/odh-dashboard-rhel8, registry.redhat.io/rhoai/odh-data-science-pipelines-argo-argoexec-rhel8 +13
- RHSA-2025:3368 Released 2025-03-27 · Red Hat rating ImportantRHOAI 2.16.0 - Red Hat OpenShift AI
- Red Hat OpenShift AI 2.16 registry.redhat.io/rhoai/odh-codeflare-operator-rhel8, registry.redhat.io/rhoai/odh-dashboard-rhel8, registry.redhat.io/rhoai/odh-data-science-pipelines-argo-argoexec-rhel8 +13
- RHSA-2025:2518 Released 2025-03-10 · Red Hat rating ModerateRed Hat Ansible Automation Platform 2.5 Product Security and Bug Fix Update
- Red Hat Ansible Automation Platform 2.5 for RHEL 8 automation-gateway-server-2.5.20250312-1.el8ap
- Red Hat Ansible Automation Platform 2.5 for RHEL 9 automation-gateway-server-2.5.20250312-1.el9ap
- RHSA-2025:1875 Released 2025-02-26 · Red Hat rating ModerateRed Hat OpenShift Service Mesh Containers for 2.5.9
- RHOSSM 2.5 for RHEL 8 openshift-service-mesh/kiali-ossmc-rhel8
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Cryostat 3 | Affected | No fix yet: Fix deferred |
| Migration Toolkit for Virtualization | Affected | No fix yet: Fix deferred |
| OpenShift Serverless | Affected | No fix yet |
| Red Hat Advanced Cluster Management for Kubernetes 2 | Affected | No fix yet: Fix deferred |
| Red Hat Advanced Cluster Security 4 | Affected | No fix planned: Will not fix |
| Red Hat Ceph Storage 6 | Affected | No fix yet |
| Red Hat Ceph Storage 8 | Affected | No fix yet |
| Red Hat Ceph Storage 9 | Affected | No fix yet |
| Red Hat Enterprise Linux 10 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 8 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 9 | Affected | No fix planned: Will not fix |
| Red Hat Integration Camel K 1 | Affected | No fix yet |
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet |
| Red Hat OpenShift Container Platform 4 | Affected | No fix planned: Will not fix |
| Red Hat OpenShift Dev Spaces | Affected | No fix yet |
| Red Hat OpenShift GitOps | Affected | No fix yet |
| Red Hat OpenShift Virtualization 4 | Affected | No fix yet: Fix deferred |
| Red Hat build of Apicurio Registry 2 | Affected | No fix planned: Will not fix |
| streams for Apache Kafka | Affected | No fix yet: Fix deferred |
| RHOSSM 2.5 for RHEL 8 | Fixed | RHSA-2025:1875 |
| Red Hat Ansible Automation Platform 2.5 for RHEL 8 | Fixed | RHSA-2025:2518 |
| Red Hat Ansible Automation Platform 2.5 for RHEL 9 | Fixed | RHSA-2025:2518 |
| Red Hat Ceph Storage 7.1 Tools | Fixed | RHSA-2026:2769 |
| Red Hat Ceph Storage 8 | Fixed | RHSA-2026:2737 |
| Red Hat Ceph Storage 9 | Fixed | RHSA-2026:3406 |
| Red Hat Ceph Storage 9.2 | Fixed | RHSA-2026:86618 |
| Red Hat Developer Hub 1.6 | Fixed | RHSA-2025:7626 |
| Red Hat OpenShift AI 2.16 | Fixed | RHSA-2025:3368 |
| Red Hat OpenShift AI 2.19 | Fixed | RHSA-2025:3886 |
| Red Hat Openshift Network Observability 1.9.3 | Fixed | RHSA-2025:10020 |
Not affected: 16 products
- RHOSSM 2.5 for RHEL 8
- Red Hat Advanced Cluster Security 4
- Red Hat Ansible Automation Platform 2
- Red Hat Ansible Automation Platform 2.5 for RHEL 8
- Red Hat Ansible Automation Platform 2.5 for RHEL 9
- Red Hat Ceph Storage 8
- Red Hat Ceph Storage 9
- Red Hat Ceph Storage 9.2
- Red Hat Developer Hub 1.6
- Red Hat OpenShift AI (RHOAI)
- Red Hat OpenShift AI 2.16
- Red Hat OpenShift AI 2.19
- Red Hat OpenShift Container Platform 4
- Red Hat Openshift Data Foundation 4
- Red Hat Openshift Network Observability 1.9.3
- Red Hat Process Automation 7
Timeline
- 2026-10-02 Threatist record created from CVE-2025-26791
- 2026-10-03 Alias added: GHSA-vhxf-7vqr-mrjg
- 2026-10-21 Fix available: RHSA-2026:86618 · Red Hat
- 2026-10-21 Fix available: Red Hat Ceph Storage 9.2 · Red Hat
References
Exploit 2
More cure53 Dompurify vulnerabilities
- TI-2026-34986 DOMPurify XSS via `selectedcontent` re-clone CVSS 3.1HIGH 8.2
- TI-2026-36811 DOMPurify IN_PLACE Sanitization Bypass via Attached Shadow Root Inside <template>.content CVSS 4.0MEDIUM 6.3
- TI-2026-36614 DOMPurify: IN_PLACE mode preserves attributes of a clobbered root element, allowing XSS via attacker-controlled root DOM CVSS 3.1MEDIUM 6.1
- TI-2026-36613 DOMPurify: Cross-realm IN_PLACE sanitization leaves executable markup intact via realm-bound `instanceof` checks CVSS 3.1MEDIUM 6.1
- TI-2026-29849 DOMPurify: FORBID_TAGS bypassed by function-based ADD_TAGS predicate (asymmetry with FORBID_ATTR fix) CVSS 4.0MEDIUM 6.0
- TI-2026-46952 DOMPurify before 3.3.2 Mutation XSS via Re-Contextualization CVSS 4.0MEDIUM 5.3
Sources
- CVE-2025-26791 · CVE Program
- CVE-2025-26791 · NVD
- FIRST EPSS
- GHSA-vhxf-7vqr-mrjg · GitHub Advisory Database · CC BY 4.0
- CVE-2025-26791 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences