CVE-2026-65899
MEDIUM
6.1
CVSS 3.1
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.
Metadata
Severity & Metrics
6.1
MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Affected products (1)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| cure53 | DOMPurify | — | 0 < 3.4.9, 3.4.9 |
Weakness (CWE)
| CWE | Source | Description |
|---|---|---|
| CWE-693 | cna | Protection Mechanism Failure |
CVSS scores (2)
| Score | Severity | Version | Source | Vector |
|---|---|---|---|---|
| 6.1 | MEDIUM | 3.1 | cna | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| 5.1 | MEDIUM | 4.0 | cna | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N |
References (3)
- GitHub Security Advisory (GHSA-vxr8-fq34-vvx9) https://github.com/cure53/DOMPurify/security/advisories/GHSA-vxr8-fq34-vvx9
- https://github.com/cure53/DOMPurify/commit/825e617753ac1169306a542d3174a77f717a0cf6 https://github.com/cure53/DOMPurify/commit/825e617753ac1169306a542d3174a77f717a0cf6
- VulnCheck Advisory: DOMPurify before 3.4.9 Trusted Types Policy State Contamination https://www.vulncheck.com/advisories/dompurify-before-trusted-types-policy-state-contamination