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VULNERABILITIES

CVE-2026-65899 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.1 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/cure53/DOMPurify/commit/825e617753ac1169306a542d3174a77f717a0cf6 [email protected]Patch
https://github.com/cure53/DOMPurify/security/advisories/GHSA-vxr8-fq34-vvx9 [email protected]ExploitThird Party Advisory
https://www.vulncheck.com/advisories/dompurify-before-trusted-types-policy-state-contamination [email protected]Third Party Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-693Protection Mechanism Failure[email protected]

Affected Products

ProductVersions
cure53 dompurify
>= 3.0.0, < 3.4.9

CPE

  • cpe:2.3:a:cure53:dompurify:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-65899
NVD Published Date:
Jul 23, 2026
NVD Last Modified:
Jul 28, 2026
Source:
[email protected]
CVE-2026-65899 Details - Not Deferred