DOMPurify before 3.3.2 URI Validation Bypass via ADD_ATTR
Priority LOW 23CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Active
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Cross-site scripting
- 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-79.
Summary
DOMPurify before 3.3.2 contains a URI validation bypass vulnerability when ADD_ATTR is provided as a predicate function via EXTRA_ELEMENT_HANDLING.attributeCheck. Attackers can supply a predicate that accepts specific attribute and tag combinations to bypass URI-safe validation, allowing unsafe protocols like javascript: to survive sanitization and execute as DOM-based XSS when the link is activated.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.003 22nd percentileScored 2026-11-07
Fix Partial DOMPurify (cure53): 3.3.2dompurify (npm): 3.3.2Red Hat: 2 advisoriesRed Hat: 1 fixed, 29 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- 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 3.3.2 | 3.3.2 | Patch available | CNA |
| — | dompurify (npm) | before 3.3.2 | 3.3.2 | Patch available | GHSA-cjmm-f4jc-qw8r |
- DOMPurify Vendorcure53 Affected before 3.3.2 Fixed in 3.3.2 Patch available CNA
- dompurify (npm) Vendor— Affected before 3.3.2 Fixed in 3.3.2 Patch available GHSA-cjmm-f4jc-qw8r
Remediation
- Fix · CNA DOMPurify (cure53) Fixed in 3.3.2
- Fix · GHSA-cjmm-f4jc-qw8r dompurify (npm) Fixed in 3.3.2 Advisory →
Red Hat 2 advisories
- 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
- RHSA-2026:54517 Released 2026-08-13 · Red Hat rating ImportantRed Hat Hardened Images RPMs Security Update
- Red Hat Hardened Images grafana13.1-13.1.3-0.1.1.hum1@aarch64, grafana13.1-13.1.3-0.1.1.hum1@src, grafana13.1-13.1.3-0.1.1.hum1@x86_64
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
cure53 DOMPurify 3.3.2
3 records Highest priority Priority MEDIUM 1 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2026-46952 DOMPurify before 3.3.2 Mutation XSS via Re-ContextualizationPriority MEDIUM 57
- TI-2026-46951 DOMPurify before 3.3.2 Prototype Pollution via USE_PROFILESPriority LOW 23
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-2026:54517, RHSA-2026:58500 |
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-2026-65912
- 2026-10-03 Alias added: GHSA-cjmm-f4jc-qw8r
- 2026-10-12 Affected versions changed · Red Hat
- 2026-10-27 Affected versions changed · Red Hat
- 2026-11-06 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-2026-65912 · CVE Program
- CVE-2026-65912 · NVD
- FIRST EPSS
- GHSA-cjmm-f4jc-qw8r · GitHub Advisory Database · CC BY 4.0
- CVE-2026-65912 · 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