Description
DOMPurify before 3.4.11 fails to clone the ALLOWED_ATTR allowlist when setConfig() is used with an uponSanitizeAttribute hook, allowing the hook to permanently mutate the shared allowlist. Attackers can register a hook that conditionally allows dangerous attributes like onerror for trusted elements, then submit untrusted content that inherits the polluted allowlist and executes event handlers as stored XSS.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| cure53 | DOMPurify | < 3.4.11 | 3.4.11 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | node-dompurify | 3.4.12+dfsg-1 | — |
| Debian 13 | node-dompurify | No fix yet | — |
| Debian 12 | node-dompurify | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | node-dompurify | No fix yet | — |
| Ubuntu 24.04 LTS | node-dompurify | No fix yet | — |
| Ubuntu 22.04 LTS | node-dompurify | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | grafana12.4 | 12.4.8-0.1.2.hum1 | RHSA-2026:58500 |
| Red Hat Hardened Images 1 | grafana13.1 | 13.1.3-0.1.3.hum1 | RHSA-2026:58502 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | python-comfyui-frontend-package | 1.52.7-1.1 | openSUSE-SU-2026:11723-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | langfuse-3-compat | 3.225.7-r6 | — |
| Wolfi rolling | langfuse-3-worker | 3.197.1-r0 | — |
| Wolfi rolling | nextcloud-server-33 | 33.0.6-r5 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | dompurify | < 3.4.11 | 3.4.11 | GHSA-cmwh-pvxp-8882 |
Advisories 3
- RHSA-2026:58502 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:58500 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- openSUSE-SU-2026:11723-1 python313-comfyui-frontend-package-1.52.7-1.1 on GA media SUSE / openSUSE Security Updates · Sep 9, 2026
References
- GitHub Security Advisory (GHSA-cmwh-pvxp-8882) vendor-advisory
- VulnCheck Advisory: DOMPurify before 3.4.11 Permanent Attribute Allowlist Pollution via setConfig third-party-advisory