CVE catalog
CVE-2026-66010
DOMPurify before 3.4.12 fails to execute afterSanitizeElements hook for custom elements allowed via CUSTOM_ELEMENT_HANDLING.tagNameCheck, allowing attributes to bypass application security policies. A
- Severity
- Medium · CVSS 5.1
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.30% · Oct 22, 2026
DOMPurify before 3.4.12 fails to execute afterSanitizeElements hook for custom elements allowed via CUSTOM_ELEMENT_HANDLING.tagNameCheck, allowing attributes to bypass application security policies. Attackers can preserve sensitive attributes on custom elements that later re-inject them into innerHTML sinks, creating second-order XSS gadgets.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | node-dompurify | sid | 3.4.16+dfsg-1 | fixed |
| Debian | node-dompurify | forky | 3.4.16+dfsg-1 | fixed |
| Debian | node-dompurify | trixie | 3.1.7+dfsg+~3.0.5-2 | vulnerable |
| Debian | node-dompurify | bookworm | 2.4.1+dfsg+~2.4.0-2+deb12u1 | vulnerable |
| Debian | node-dompurify | bookworm-security | 2.4.1+dfsg+~2.4.0-2 | vulnerable |
| Npm | dompurify | Not reported | 3.4.12 | fixed |
| Ubuntu | node-dompurify | 22.04 | 2.3.0+dfsg-2 | vulnerable |
| Ubuntu | node-dompurify | 22.04 | 2.3.3+dfsg-1 | vulnerable |
| Ubuntu | node-dompurify | 24.04 | 2.4.1+dfsg+~2.4.0-1 | vulnerable |
| Ubuntu | node-dompurify | 24.04 | 3.0.9+dfsg+~3.0.5-1 | vulnerable |
| Ubuntu | node-dompurify | 26.04 | 3.1.7+dfsg+~3.0.5-2 | vulnerable |
| Ubuntu | node-dompurify | 26.04 | 3.3.3+dfsg-1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | node-dompurify | source | sid | 3.4.12+dfsg-1 | not yet assigned | Not reported | Not reported |
| Debian | node-dompurify | source | forky | 3.4.12+dfsg-1 | not yet assigned | Not reported | Not reported |
| Debian | node-dompurify | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | node-dompurify | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Npm | dompurify | npm | Not reported | 3.4.12 | Not reported | GHSA-C2J3-45GR-MQC4 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [node-dompurify]Affected
Details (4)
2.4.1+dfsg+~2.4.0-2+deb12u1· all · bookwormAffected
nvd · node-dompurify · debian · bookworm; nvd · node-dompurify · debian · 12
2.4.1+dfsg+~2.4.0-2+deb12u1· all · bookwormAffected
nvd · node-dompurify · debian · bookworm; nvd · node-dompurify · debian · 12
2.4.1+dfsg+~2.4.0-2· all · bookworm-securityAffected
nvd · node-dompurify · debian · bookworm; nvd · node-dompurify · debian · 12
2.4.1+dfsg+~2.4.0-2· all · bookworm-securityAffected
nvd · node-dompurify · debian · bookworm; nvd · node-dompurify · debian · 12
[Debian 13 (Trixie)]
- [node-dompurify]Affected
Details (2)
3.1.7+dfsg+~3.0.5-2· all · trixieAffected
nvd · node-dompurify · debian · 13
3.1.7+dfsg+~3.0.5-2· all · trixieAffected
nvd · node-dompurify · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/]
- [https://github.com/advisories/GHSA-c2j3-45gr-mqc4]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-66010]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-66010]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-66010]
- [https://security-tracker.debian.org/tracker/CVE-2026-66010]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3098.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]