UBUNTU-CVE-2026-65904

DOMPurify through 3.3.3 fails to sanitize DOM elements passed via INPLACE mode when the element originates from a different window/realm e.g., an iframe's contentDocument. A cross-realm instanceof check in the private isNode function returns false for foreign-realm nodes, causing DOMPurify to...

UBUNTU-CVE-2026-65898

DOMPurify before 3.4.11 fails to clone the ALLOWEDATTR 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,...

UBUNTU-CVE-2026-65914

DOMPurify before 3.3.2 contains a mutation-XSS vulnerability when sanitized HTML is reinserted into special parsing contexts using innerHTML with wrappers like script, xmp, iframe, noembed, noframes, or noscript. Attackers can craft payloads with closing sequences that break out of the wrapper...

UBUNTU-CVE-2026-65911

In DOMPurify through 3.3.3, function predicates supplied via ADDATTR or ADDTAGS to DOMPurify.sanitize persist in internal state EXTRAELEMENTHANDLING across subsequent sanitize calls on the same instance. If a later call on the same instance provides ADDATTR or ADDTAGS as an array rather than a...

UBUNTU-CVE-2026-65912

DOMPurify before 3.3.2 contains a URI validation bypass vulnerability when ADDATTR is provided as a predicate function via EXTRAELEMENTHANDLING.attributeCheck. Attackers can supply a predicate that accepts specific attribute and tag combinations to bypass URI-safe validation, allowing unsafe...

UBUNTU-CVE-2026-65901

DOMPurify through 3.4.6 contains a cross-site scripting vulnerability in INPLACE mode that trusts attacker-controlled nodeName on live non-form nodes. Attackers can supply hostile live DOM objects with real script children whose observable nodeName is clobbered to appear as allowed elements,...

UBUNTU-CVE-2026-65913

DOMPurify before 3.3.2 contains a prototype pollution vulnerability in USEPROFILES mode that allows attackers to bypass attribute filtering by polluting Array.prototype properties. Attackers can set Array.prototype properties like onclick to true, causing DOMPurify to accept event handlers as...

UBUNTU-CVE-2026-65903

DOMPurify before 3.4.0 contains a logic error in the ADDTAGS function where short-circuit evaluation allows forbidden tags to bypass FORBIDTAGS restrictions. Attackers can craft input containing tags listed in FORBIDTAGS that are also added via ADDTAGS function, causing them to be retained in...

UBUNTU-CVE-2026-65899

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 TRUSTEDTYPESPOLICY. A later caller that requests RETURNTRUSTEDTYPE output receives a TrustedHTML...

CVE-2026-65914

DOMPurify before 3.3.2 contains a mutation-XSS vulnerability when sanitized HTML is reinserted into special parsing contexts using innerHTML with wrappers like script, xmp, iframe, noembed, noframes, or noscript. Attackers can craft payloads with closing sequences that break out of the wrapper...

CVE-2026-65914

DOMPurify contains a mutation-XSS in versions before 3.3.2 when sanitized HTML is reinserted into special parsing contexts via innerHTML wrappers (script, xmp, iframe, noembed, noframes, noscript). Attackers can craft payloads with closing sequences to break out of the wrapper during reparsing, r...

CVE-2026-65913

DOMPurify before 3.3.2 contains a prototype pollution vulnerability in USEPROFILES mode that allows attackers to bypass attribute filtering by polluting Array.prototype properties. Attackers can set Array.prototype properties like onclick to true, causing DOMPurify to accept event handlers as...

CVE-2026-65913 DOMPurify before 3.3.2 Prototype Pollution via USE_PROFILES

DOMPurify before 3.3.2 contains a prototype pollution vulnerability in USEPROFILES mode that allows attackers to bypass attribute filtering by polluting Array.prototype properties. Attackers can set Array.prototype properties like onclick to true, causing DOMPurify to accept event handlers as...

CVE-2026-65914 DOMPurify before 3.3.2 Mutation XSS via Re-Contextualization

DOMPurify before 3.3.2 contains a mutation-XSS vulnerability when sanitized HTML is reinserted into special parsing contexts using innerHTML with wrappers like script, xmp, iframe, noembed, noframes, or noscript. Attackers can craft payloads with closing sequences that break out of the wrapper...

CVE-2026-65913

DOMPurify prior to 3.3.2 is affected by a prototype pollution vulnerability in USE_PROFILES mode. An attacker can pollute Array.prototype properties (e.g., onclick) to bypass attribute filtering, causing DOMPurify to treat event handler attributes as allowed. This enables DOM-based XSS when sanit...

CVE-2026-65912

DOMPurify before 3.3.2 contains a URI validation bypass vulnerability when ADDATTR is provided as a predicate function via EXTRAELEMENTHANDLING.attributeCheck. Attackers can supply a predicate that accepts specific attribute and tag combinations to bypass URI-safe validation, allowing unsafe...

CVE-2026-65912

DOMPurify before 3.3.2 has a URI validation bypass when ADD_ATTR is used as a predicate via EXTRA_ELEMENT_HANDLING.attributeCheck. An attacker can craft a predicate to accept specific attribute/tag combinations, allowing unsafe protocols like javascript: to bypass validation and execute as DOM-ba...

CVE-2026-65912 DOMPurify before 3.3.2 URI Validation Bypass via ADD_ATTR

DOMPurify before 3.3.2 contains a URI validation bypass vulnerability when ADDATTR is provided as a predicate function via EXTRAELEMENTHANDLING.attributeCheck. Attackers can supply a predicate that accepts specific attribute and tag combinations to bypass URI-safe validation, allowing unsafe...

CVE-2026-65912 DOMPurify before 3.3.2 URI Validation Bypass via ADD_ATTR

DOMPurify before 3.3.2 contains a URI validation bypass vulnerability when ADDATTR is provided as a predicate function via EXTRAELEMENTHANDLING.attributeCheck. Attackers can supply a predicate that accepts specific attribute and tag combinations to bypass URI-safe validation, allowing unsafe...

CVE-2026-65904

CVE-2026-65904 affects DOMPurify up to version 3.4.3. In IN_PLACE mode, elements sourced from a different window/realm (e.g., iframe contentDocument) fail sanitization due to a cross-realm instanceof check in private _isNode(). The check returns false for foreign-realm nodes, causing the element ...