CVE-2026-66010Medium· 6.1▾ TwilightPoC availableA flaw was found in DOMPurify. This vulnerability allows attackers to bypass application security policies by preserving sensitive attributes on custom elements. These attributes can then be re-injected into web page content, leading to Cr…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 33.6 · likelihood 0 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the vendor's CSAF advisory record, not NVD.
Exploit-prediction probability, daily snapshots since Sep 17.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
0.2% → 0.3%
medium → low
Last analysed / modified upstream
low → medium
A flaw was found in DOMPurify. This vulnerability allows attackers to bypass application security policies by preserving sensitive attributes on custom elements. These attributes can then be re-injected into web page content, leading to Cross-Site Scripting (XSS) attacks. An attacker could exploit this to execute malicious scripts in a user's browser, potentially leading to information disclosure or unauthorized actions.
dompurify: DOMPurify: Cross-Site Scripting (XSS) via custom element attribute bypass — rated Moderate by Red Hat. Released 2026-07-24, updated 2026-10-15.
Affected:
No fix planned:
Not affected:
Fix deferred
Workarounds / mitigations:
Affected packages:
dompurify <= 3.4.11Patched in:
dompurify 3.4.12Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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