Vulnerability Details CVE-2026-65902
DOMPurify before 3.4.7 (affected versions <= 3.4.5) passes direct references to the module-level DEFAULT_ALLOWED_TAGS and DEFAULT_ALLOWED_ATTR sets to the uponSanitizeElement and uponSanitizeAttribute hooks via data.allowedTags / data.allowedAttributes when sanitize is called without an explicit cfg.ALLOWED_TAGS / cfg.ALLOWED_ATTR array. A hook that mutates these fields permanently widens the default allow-lists for the lifetime of the DOMPurify instance, so all subsequent default-config sanitize calls inherit the widened defaults and attacker payloads using the poisoned tag/attribute name survive sanitization. removeAllHooks(), clearConfig(), and passing a fresh cfg do not recover the state; only constructing a new DOMPurify instance does.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 9.6%
CVSS Severity
CVSS v3 Score 6.1
References
- https://github.com/cure53/DOMPurify/commit/7996f1dc78eb8b7922388aed75d94a9f8fad9a36
- https://github.com/cure53/DOMPurify/security/advisories/GHSA-76mc-f452-cxcm
- https://www.vulncheck.com/advisories/dompurify-before-hook-mutation-pollution-via-allowedtags
- https://github.com/cure53/DOMPurify/security/advisories/GHSA-76mc-f452-cxcm
Products affected by CVE-2026-65902
-
cpe:2.3:a:cure53:dompurify:-
-
cpe:2.3:a:cure53:dompurify:0.1
-
cpe:2.3:a:cure53:dompurify:0.3
-
cpe:2.3:a:cure53:dompurify:0.4
-
cpe:2.3:a:cure53:dompurify:0.4.2
-
cpe:2.3:a:cure53:dompurify:0.4.3
-
cpe:2.3:a:cure53:dompurify:0.4.4
-
cpe:2.3:a:cure53:dompurify:0.4.5
-
cpe:2.3:a:cure53:dompurify:0.6.0
-
cpe:2.3:a:cure53:dompurify:0.6.1
-
cpe:2.3:a:cure53:dompurify:0.6.2
-
cpe:2.3:a:cure53:dompurify:0.6.3
-
cpe:2.3:a:cure53:dompurify:0.6.4
-
cpe:2.3:a:cure53:dompurify:0.6.5
-
cpe:2.3:a:cure53:dompurify:0.6.6
-
cpe:2.3:a:cure53:dompurify:0.6.7
-
cpe:2.3:a:cure53:dompurify:0.7.0
-
cpe:2.3:a:cure53:dompurify:0.7.1
-
cpe:2.3:a:cure53:dompurify:0.7.2
-
cpe:2.3:a:cure53:dompurify:0.7.3
-
cpe:2.3:a:cure53:dompurify:0.7.4
-
cpe:2.3:a:cure53:dompurify:0.8.0
-
cpe:2.3:a:cure53:dompurify:0.8.1
-
cpe:2.3:a:cure53:dompurify:0.8.2
-
cpe:2.3:a:cure53:dompurify:0.8.3
-
cpe:2.3:a:cure53:dompurify:0.8.4
-
cpe:2.3:a:cure53:dompurify:0.8.5
-
cpe:2.3:a:cure53:dompurify:0.8.6
-
cpe:2.3:a:cure53:dompurify:0.8.7
-
cpe:2.3:a:cure53:dompurify:0.8.8
-
cpe:2.3:a:cure53:dompurify:0.8.9
-
cpe:2.3:a:cure53:dompurify:0.9.0
-
cpe:2.3:a:cure53:dompurify:1.0.0
-
cpe:2.3:a:cure53:dompurify:1.0.1
-
cpe:2.3:a:cure53:dompurify:1.0.10
-
cpe:2.3:a:cure53:dompurify:1.0.11
-
cpe:2.3:a:cure53:dompurify:1.0.2
-
cpe:2.3:a:cure53:dompurify:1.0.3
-
cpe:2.3:a:cure53:dompurify:1.0.4
-
cpe:2.3:a:cure53:dompurify:1.0.5
-
cpe:2.3:a:cure53:dompurify:1.0.6
-
cpe:2.3:a:cure53:dompurify:1.0.7
-
cpe:2.3:a:cure53:dompurify:1.0.8
-
cpe:2.3:a:cure53:dompurify:1.0.9
-
cpe:2.3:a:cure53:dompurify:2.0.0
-
cpe:2.3:a:cure53:dompurify:2.0.1
-
cpe:2.3:a:cure53:dompurify:2.0.17
-
cpe:2.3:a:cure53:dompurify:2.0.2
-
cpe:2.3:a:cure53:dompurify:2.1.0
-
cpe:2.3:a:cure53:dompurify:2.1.1
-
cpe:2.3:a:cure53:dompurify:2.2.0
-
cpe:2.3:a:cure53:dompurify:2.2.2
-
cpe:2.3:a:cure53:dompurify:2.2.3
-
cpe:2.3:a:cure53:dompurify:2.2.4
-
cpe:2.3:a:cure53:dompurify:2.2.6
-
cpe:2.3:a:cure53:dompurify:2.2.7
-
cpe:2.3:a:cure53:dompurify:2.2.8
-
cpe:2.3:a:cure53:dompurify:2.2.9
-
cpe:2.3:a:cure53:dompurify:2.3.0
-
cpe:2.3:a:cure53:dompurify:2.3.1
-
cpe:2.3:a:cure53:dompurify:2.3.10
-
cpe:2.3:a:cure53:dompurify:2.3.11
-
cpe:2.3:a:cure53:dompurify:2.3.12
-
cpe:2.3:a:cure53:dompurify:2.3.2
-
cpe:2.3:a:cure53:dompurify:2.3.3
-
cpe:2.3:a:cure53:dompurify:2.3.4
-
cpe:2.3:a:cure53:dompurify:2.3.5
-
cpe:2.3:a:cure53:dompurify:2.3.6
-
cpe:2.3:a:cure53:dompurify:2.3.8
-
cpe:2.3:a:cure53:dompurify:2.3.9
-
cpe:2.3:a:cure53:dompurify:2.4.0
-
cpe:2.3:a:cure53:dompurify:2.4.1
-
cpe:2.3:a:cure53:dompurify:2.4.2
-
cpe:2.3:a:cure53:dompurify:2.4.3
-
cpe:2.3:a:cure53:dompurify:2.4.4
-
cpe:2.3:a:cure53:dompurify:2.4.5
-
cpe:2.3:a:cure53:dompurify:2.4.6
-
cpe:2.3:a:cure53:dompurify:2.4.7
-
cpe:2.3:a:cure53:dompurify:2.4.8
-
cpe:2.3:a:cure53:dompurify:2.4.9
-
cpe:2.3:a:cure53:dompurify:2.5.0
-
cpe:2.3:a:cure53:dompurify:2.5.1
-
cpe:2.3:a:cure53:dompurify:2.5.2
-
cpe:2.3:a:cure53:dompurify:2.5.3
-
cpe:2.3:a:cure53:dompurify:2.5.4
-
cpe:2.3:a:cure53:dompurify:2.5.5
-
cpe:2.3:a:cure53:dompurify:2.5.6
-
cpe:2.3:a:cure53:dompurify:2.5.7
-
cpe:2.3:a:cure53:dompurify:2.5.8
-
cpe:2.3:a:cure53:dompurify:2.5.9
-
cpe:2.3:a:cure53:dompurify:3.0.0
-
cpe:2.3:a:cure53:dompurify:3.0.1
-
cpe:2.3:a:cure53:dompurify:3.0.10
-
cpe:2.3:a:cure53:dompurify:3.0.11
-
cpe:2.3:a:cure53:dompurify:3.0.2
-
cpe:2.3:a:cure53:dompurify:3.0.3
-
cpe:2.3:a:cure53:dompurify:3.0.4
-
cpe:2.3:a:cure53:dompurify:3.0.5
-
cpe:2.3:a:cure53:dompurify:3.0.6
-
cpe:2.3:a:cure53:dompurify:3.0.7
-
cpe:2.3:a:cure53:dompurify:3.0.8
-
cpe:2.3:a:cure53:dompurify:3.0.9
-
cpe:2.3:a:cure53:dompurify:3.1.0
-
cpe:2.3:a:cure53:dompurify:3.1.1
-
cpe:2.3:a:cure53:dompurify:3.1.2
-
cpe:2.3:a:cure53:dompurify:3.1.3
-
cpe:2.3:a:cure53:dompurify:3.1.4
-
cpe:2.3:a:cure53:dompurify:3.1.5
-
cpe:2.3:a:cure53:dompurify:3.1.6
-
cpe:2.3:a:cure53:dompurify:3.1.7
-
cpe:2.3:a:cure53:dompurify:3.2.0
-
cpe:2.3:a:cure53:dompurify:3.2.1
-
cpe:2.3:a:cure53:dompurify:3.2.2
-
cpe:2.3:a:cure53:dompurify:3.2.3
-
cpe:2.3:a:cure53:dompurify:3.2.4
-
cpe:2.3:a:cure53:dompurify:3.2.5
-
cpe:2.3:a:cure53:dompurify:3.2.6
-
cpe:2.3:a:cure53:dompurify:3.2.7
-
cpe:2.3:a:cure53:dompurify:3.3.0
-
cpe:2.3:a:cure53:dompurify:3.3.1
-
cpe:2.3:a:cure53:dompurify:3.3.2
-
cpe:2.3:a:cure53:dompurify:3.3.3
-
cpe:2.3:a:cure53:dompurify:3.4.0
-
cpe:2.3:a:cure53:dompurify:3.4.1
-
cpe:2.3:a:cure53:dompurify:3.4.2
-
cpe:2.3:a:cure53:dompurify:3.4.3
-
cpe:2.3:a:cure53:dompurify:3.4.4
-
cpe:2.3:a:cure53:dompurify:3.4.5
-
cpe:2.3:a:cure53:dompurify:3.4.6