VDB
CVE-2026-65899
CVE-2026-65899
PUBLISHED
CVSS 5.1 MEDIUM
Reported by VulnCheck · Published July 23, 2026
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.
Risk Scores
CVSS 4.0
5.1
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
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| cure53 | DOMPurify | 0, 3.4.9 |
| wolfi | nextcloud-server-33 | 0, 0, 0 |
| chainguard | gitlab-rails-ce-19.1 | 0, 0 |
| cure53 | dompurify | 0, 0, 0 |
| wolfi | nextcloud-server-32 | 0, 0, 0 |
| chainguard | kibana-9.2 | 0, 0, 0 |
| wolfi | langfuse-3 | 0, 0, 0 |
| chainguard | langfuse-fips-3 | 0, 0, 0 |
| chainguard | opensearch-dashboards-3 | 0, 0, 0 |
| cure53 | DOMPurify | 0, 0, 3.4.9 |
| chainguard | langfuse-3 | 0, 0, 0 |
| chainguard | nextcloud-server-33 | 0, 0, 0 |
| chainguard | wazuh-dashboard | 0, 0, 0 |
| chainguard | librechat | 0, 0, 0 |
| chainguard | nextcloud-server-34 | 0, 0, 0 |
| chainguard | nextcloud-server-32 | 0, 0, 0 |
| chainguard | kibana-9.4 | 0, 0, 0 |
| chainguard | wazuh-dashboard-fips | 0, 0, 0 |
| chainguard | gitlab-rails-ce-fips-19.1 | 0, 0 |
| chainguard | kibana-9.1 | 0, 0, 0 |
…and 2 more
Timeline
- Jun 15, 2026 CVE Published
- Jul 23, 2026 Coalition ESS Score
- Jul 25, 2026 EPSS Score
- Jul 26, 2026 Security Advisory
- Aug 7, 2026 EPSS Score
- Aug 24, 2026 EPSS Score
- Aug 28, 2026 EPSS Score
- Sep 5, 2026 EPSS Score
- Sep 9, 2026 EPSS Score
- Sep 12, 2026 EPSS Score
- Sep 16, 2026 EPSS Score
- Sep 18, 2026 EPSS Score
References
- GitHub Security Advisory (GHSA-vxr8-fq34-vvx9) vendor-advisory
- Patch Commit patch
- VulnCheck Advisory: DOMPurify before 3.4.9 Trusted Types Policy State Contamination third-party-advisory