CVE-2026-65898
7.2 · HIGHOverview
CVE-2026-65898 is a high-severity vulnerability affecting cure53 dompurify. It was published on July 23, 2026 and has a CVSS 3.1 base score of 7.2 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
DOMPurify before 3.4.11 fails to clone the ALLOWED_ATTR allowlist when setConfig() is used with an uponSanitizeAttribute hook, allowing the hook to permanently mutate the shared allowlist. Attackers can register a hook that conditionally allows dangerous attributes like onerror for trusted elements, then submit untrusted content that inherits the polluted allowlist and executes event handlers as stored XSS.
Remediation
Check the references section for vendor advisories and patches from cure53. Update dompurify to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| cure53 | dompurify | >= 0, < 3.4.11 | Affected |
Frequently Asked Questions
What is CVE-2026-65898?
CVE-2026-65898 is a high-severity vulnerability affecting cure53 dompurify. It was published on July 23, 2026 and has a CVSS 3.1 base score of 7.2 (HIGH).
How severe is CVE-2026-65898?
This vulnerability has a CVSS 3.1 base score of 7.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-65898?
Check the references section for vendor advisories and patches from cure53. Update dompurify to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-65898?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-65898 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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