DOMPurify before 3.4.9 Trusted Types Policy State Contamination
Priority LOW 29CWE-693Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Active
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · None · None
- Fix status
- Partial Red Hat: 1 fixed, 29 without a fix
Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-693.
Summary
DOMPurify 3.0.0 before 3.4.9 does not reset the retained Trusted Types policy when clearConfig() is called, so a DOMPurify instance reused across trust boundaries stays bound to a previously supplied TRUSTED_TYPES_POLICY. A later caller that requests RETURN_TRUSTED_TYPE output receives a TrustedHTML object created by the old (potentially unsafe) policy rather than a clean default, which can lead to script execution at a Trusted Types sink. Passing TRUSTED_TYPES_POLICY: null on the later call also does not clear the retained policy.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00413 35th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial DOMPurify (cure53): 3.4.9dompurify (npm): 3.4.9Red Hat: 2 advisoriesRed Hat: 1 fixed, 29 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- 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 3.4.9 | 3.4.9 | Patch available | CNA |
| — | dompurify (npm) | before 3.4.9 | 3.4.9 | Patch available | GHSA-vxr8-fq34-vvx9 |
- DOMPurify Vendorcure53 Affected before 3.4.9 Fixed in 3.4.9 Patch available CNA
- dompurify (npm) Vendor— Affected before 3.4.9 Fixed in 3.4.9 Patch available GHSA-vxr8-fq34-vvx9
Remediation
- Fix · CNA DOMPurify (cure53) Fixed in 3.4.9
- Fix · GHSA-vxr8-fq34-vvx9 dompurify (npm) Fixed in 3.4.9 Advisory →
Red Hat 2 advisories
- RHSA-2026:58502 Released 2026-08-22 · Red Hat rating ModerateRed Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images grafana13.1-13.1.3-0.1.3.hum1@aarch64, grafana13.1-13.1.3-0.1.3.hum1@src, grafana13.1-13.1.3-0.1.3.hum1@x86_64
- RHSA-2026:58500 Released 2026-08-22 · Red Hat rating ModerateRed Hat Hardened Images RPMs Security Update
- Red Hat Hardened Images grafana12.4-12.4.8-0.1.2.hum1@aarch64, grafana12.4-12.4.8-0.1.2.hum1@src, grafana12.4-12.4.8-0.1.2.hum1@x86_64
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Migration Toolkit for Virtualization | Affected | No fix yet: Fix deferred |
| Multicluster Engine for Kubernetes | Affected | No fix yet: Fix deferred |
| Node HealthCheck Operator | Affected | No fix yet: Fix deferred |
| OpenShift Lightspeed | Affected | No fix yet: Fix deferred |
| OpenShift Service Mesh 3 | Affected | No fix yet: Fix deferred |
| Red Hat 3scale API Management Platform 2 | Affected | No fix yet: Fix deferred |
| Red Hat AMQ Broker 7 | Affected | No fix yet: Fix deferred |
| Red Hat Advanced Cluster Management for Kubernetes 2 | Affected | No fix yet: Fix deferred |
| Red Hat Advanced Cluster Security 4 | Affected | No fix yet: Fix deferred |
| Red Hat Ansible Automation Platform 2 | Affected | No fix yet: Fix deferred |
| Red Hat Build of Podman Desktop | Affected | No fix yet: Fix deferred |
| Red Hat Ceph Storage 6 | Affected | No fix yet: Fix deferred |
| Red Hat Ceph Storage 8 | Affected | No fix yet: Fix deferred |
| Red Hat Ceph Storage 9 | Affected | No fix yet: Fix deferred |
| Red Hat Data Grid 8 | Affected | No fix yet: Fix deferred |
| Red Hat Developer Hub 1 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Dev Spaces | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift GitOps | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Virtualization 4 | Affected | No fix yet: Fix deferred |
| Red Hat Openshift Data Foundation 4 | Affected | No fix yet: Fix deferred |
| Red Hat build of Apache Camel for Spring Boot 4 | Affected | No fix yet: Fix deferred |
| Red Hat build of Apicurio Registry 3 | Affected | No fix yet: Fix deferred |
| Self-service automation portal 2 | Affected | No fix yet: Fix deferred |
| Red Hat Hardened Images | Fixed | RHSA-2026:58500, RHSA-2026:58502 |
Not affected: 4 products
- Ansible Automation Orchestrator 2026
- Red Hat Ansible Automation Platform 2
- Red Hat Enterprise Linux 10
- Red Hat Hardened Images
Timeline
- 2026-10-02 Threatist record created from CVE-2026-65899
- 2026-10-03 Alias added: GHSA-vxr8-fq34-vvx9
- 2026-10-09 Affected versions changed · Red Hat
- 2026-10-27 Affected versions changed · Red Hat
- 2026-10-31 Affected versions changed · Red Hat
References
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-2025-19705 Cross-site scripting in cure53 DOMPurify CVSS 3.1MEDIUM 6.1
Sources
- CVE-2026-65899 · CVE Program
- CVE-2026-65899 · NVD
- FIRST EPSS
- GHSA-vxr8-fq34-vvx9 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-65899 · 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