CVE-2026-47423
DOM-based XSS in DOMPurify 3.4.4 via <selectedcontent> re-cloning.
Is CVE-2026-47423 being exploited?
Not confirmed. CVE-2026-47423 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.41% probability of exploitation in the next 30 days.
How severe is CVE-2026-47423?
CVE-2026-47423 is rated High with a CVSS score of 8.2. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-47423?
Yes. A fix has been recorded for CVE-2026-47423. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-47423 affect?
CVE-2026-47423 affects DOMPurify <= 3.4.4, Web applications using DOMPurify, Browsers rendering sanitized content. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-47423?
Upgrade to DOMPurify 3.4.5+, audit usages, rebuild and redeploy.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
DOM-based XSS: sanitized payloads can be re-cloned via <selectedcontent>, enabling script injection, session theft, and account takeover in users' browsers.
Patch when possible
- affected>= 3.4.4 and < 3.4.5
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.