What is CVE-2026-65899?

CVE-2026-65899 is a medium-severity vulnerability in Cure53 Dompurify, classified under Protection Mechanism Failure. CVSS score: 6.1/10. Published 2026-07-23.

How severe is CVE-2026-65899?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Vulnerability in Cure53 Dompurify

CVE-2026-65899

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 th…

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Cure53 Dompurify — versions 0, 3.4.9

Weakness classification (CWE)

CWE-693 — Protection Mechanism Failure

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-65899?: CVE-2026-65899 is a medium-severity vulnerability in Cure53 Dompurify, classified under Protection Mechanism Failure. CVSS score: 6.1/10. Published 2026-07-23.
How severe is CVE-2026-65899?: Medium severity. CVSS v3 base score is 6.1 out of 10.