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56 vulnerabilities by Cure53
CVE-2026-65914 (GCVE-0-2026-65914)
Vulnerability from nvd – Published: 2026-07-23 13:16 – Updated: 2026-07-23 13:57
VLAI
EPSS
VEX
Title
DOMPurify before 3.3.2 Mutation XSS via Re-Contextualization
Summary
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 context during reparsing, reactivating dangerous markup with event handlers to execute JavaScript.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
| https://www.vulncheck.com/advisories/dompurify-be… | third-party-advisory |
Impacted products
Date Public
2026-03-25 00:00
Credits
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CVE-2026-65913 (GCVE-0-2026-65913)
Vulnerability from nvd – Published: 2026-07-23 13:16 – Updated: 2026-07-23 13:38
VLAI
EPSS
VEX
Title
DOMPurify before 3.3.2 Prototype Pollution via USE_PROFILES
Summary
DOMPurify before 3.3.2 contains a prototype pollution vulnerability in USE_PROFILES 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 allowlisted attributes and resulting in DOM-based XSS when sanitized markup is rendered.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
| https://www.vulncheck.com/advisories/dompurify-be… | third-party-advisory |
Impacted products
Date Public
2026-04-01 00:00
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CVE-2026-65912 (GCVE-0-2026-65912)
Vulnerability from nvd – Published: 2026-07-23 13:16 – Updated: 2026-07-23 15:46
VLAI
EPSS
VEX
Title
DOMPurify before 3.3.2 URI Validation Bypass via ADD_ATTR
Summary
DOMPurify before 3.3.2 contains a URI validation bypass vulnerability when ADD_ATTR is provided as a predicate function via EXTRA_ELEMENT_HANDLING.attributeCheck. Attackers can supply a predicate that accepts specific attribute and tag combinations to bypass URI-safe validation, allowing unsafe protocols like javascript: to survive sanitization and execute as DOM-based XSS when the link is activated.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
| https://www.vulncheck.com/advisories/dompurify-be… | third-party-advisory |
Impacted products
Date Public
2026-04-01 00:00
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CVE-2026-65911 (GCVE-0-2026-65911)
Vulnerability from nvd – Published: 2026-07-23 13:16 – Updated: 2026-07-23 13:16
VLAI
EPSS
VEX
Title
DOMPurify before 3.4.0 XSS via ADD_ATTR/ADD_TAGS State Leakage
Summary
In DOMPurify through 3.3.3, function predicates supplied via ADD_ATTR or ADD_TAGS to DOMPurify.sanitize() persist in internal state (EXTRA_ELEMENT_HANDLING) across subsequent sanitize() calls on the same instance. If a later call on the same instance provides ADD_ATTR or ADD_TAGS as an array rather than a function, the previously set function handler is neither cleared nor overwritten, so it continues to approve attacker-controlled attributes or tags. This can allow dangerous event-handler attributes or forbidden tags (bypassing FORBID_TAGS) to survive sanitization, resulting in cross-site scripting. The vendor (Cure53) considers this an edge case outside DOMPurify's threat model; the referenced advisory lists 3.4.0 as the patched version.
Severity
6.1 (Medium)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
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Impacted products
Date Public
2026-04-01 00:00
Credits
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CVE-2026-65904 (GCVE-0-2026-65904)
Vulnerability from nvd – Published: 2026-07-23 13:16 – Updated: 2026-07-23 15:46
VLAI
EPSS
VEX
Title
DOMPurify before 3.4.4 Cross-Site Scripting via IN_PLACE mode
Summary
DOMPurify through 3.3.3 fails to sanitize DOM elements passed via IN_PLACE 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 stringify the element (yielding '[object HTMLDivElement]'), silently reset IN_PLACE to false, and return the unsanitized element unchanged with any XSS payloads intact. The vendor considers this an edge case outside DOMPurify's threat model and, at time of publication, no fix was planned.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
| https://www.vulncheck.com/advisories/dompurify-be… | third-party-advisory |
Impacted products
Date Public
2026-04-01 00:00
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CVE-2026-65903 (GCVE-0-2026-65903)
Vulnerability from nvd – Published: 2026-07-23 13:16 – Updated: 2026-07-23 15:35
VLAI
EPSS
VEX
Title
DOMPurify before 3.4.0 ADD_TAGS Function Bypasses FORBID_TAGS
Summary
DOMPurify before 3.4.0 contains a logic error in the ADD_TAGS function where short-circuit evaluation allows forbidden tags to bypass FORBID_TAGS restrictions. Attackers can craft input containing tags listed in FORBID_TAGS that are also added via ADD_TAGS function, causing them to be retained in sanitized output.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-697 - Incorrect Comparison
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
| https://www.vulncheck.com/advisories/dompurify-be… | third-party-advisory |
Impacted products
Date Public
2026-04-15 00:00
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CVE-2026-65902 (GCVE-0-2026-65902)
Vulnerability from nvd – Published: 2026-07-23 13:16 – Updated: 2026-07-23 13:58
VLAI
EPSS
VEX
Title
DOMPurify before 3.4.7 Hook Mutation Pollution via allowedTags
Summary
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.
Severity
6.1 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-501 - Trust Boundary Violation
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
| https://github.com/cure53/DOMPurify/commit/7996f1… | patch |
| https://www.vulncheck.com/advisories/dompurify-be… | third-party-advisory |
Impacted products
Date Public
2026-05-26 00:00
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CVE-2026-65901 (GCVE-0-2026-65901)
Vulnerability from nvd – Published: 2026-07-23 13:16 – Updated: 2026-07-23 13:39
VLAI
EPSS
VEX
Title
DOMPurify 3.4.6 Cross-Site Scripting via IN_PLACE nodeName
Summary
DOMPurify through 3.4.6 contains a cross-site scripting vulnerability in IN_PLACE 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, causing scripts to execute when the sanitized tree is inserted into a live document.
Severity
6.1 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
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| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
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CVE-2026-65900 (GCVE-0-2026-65900)
Vulnerability from nvd – Published: 2026-07-23 13:16 – Updated: 2026-07-23 18:02
VLAI
EPSS
VEX
Title
DOMPurify before 3.4.8 Template Expression Injection via RETURN_DOM
Summary
DOMPurify versions >=3.0.0 and before 3.4.8, when configured with SAFE_FOR_TEMPLATES together with a DOM output mode (RETURN_DOM, RETURN_DOM_FRAGMENT, or IN_PLACE), fail to strip template expressions (e.g. ${evil}, {{evil}}, <%evil%>) inside <template> element content. The final normalization/scrub pass (_scrubTemplateExpressions) uses a NodeIterator and node.normalize() that do not descend into template.content, so expressions that only form after adjacent text nodes merge survive sanitization. This bypasses SAFE_FOR_TEMPLATES and can allow a downstream template engine to evaluate attacker-supplied expressions. The string output path is not affected.
Severity
6.1 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
| https://www.vulncheck.com/advisories/dompurify-be… | third-party-advisory |
Impacted products
Date Public
2026-05-29 00:00
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CVE-2026-65899 (GCVE-0-2026-65899)
Vulnerability from nvd – Published: 2026-07-23 13:16 – Updated: 2026-07-23 13:16
VLAI
EPSS
VEX
Title
DOMPurify before 3.4.9 Trusted Types Policy State Contamination
Summary
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.
Severity
6.1 (Medium)
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
| https://github.com/cure53/DOMPurify/commit/825e61… | patch |
| https://www.vulncheck.com/advisories/dompurify-be… | third-party-advisory |
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Date Public
2026-06-10 00:00
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CVE-2026-65898 (GCVE-0-2026-65898)
Vulnerability from nvd – Published: 2026-07-23 13:16 – Updated: 2026-07-23 15:47
VLAI
EPSS
VEX
Title
DOMPurify before 3.4.11 Permanent Attribute Allowlist Pollution via setConfig
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
| https://www.vulncheck.com/advisories/dompurify-be… | third-party-advisory |
Impacted products
Date Public
2026-06-17 00:00
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CVE-2026-49978 (GCVE-0-2026-49978)
Vulnerability from nvd – Published: 2026-07-14 20:02 – Updated: 2026-07-21 14:59
VLAI
EPSS
VEX
Title
DOMPurify IN_PLACE Sanitization Bypass via Attached Shadow Root Inside <template>.content
Summary
DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.7, DOMPurify IN_PLACE sanitization could skip shadow contents attached to an element inside <template>.content, allowing attacker-controlled markup such as event handlers, JavaScript URLs, or scripts to survive and execute when an application cloned and inserted the sanitized template. This issue is fixed in version 3.4.7.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | x_refsource_CONFIRM |
| https://github.com/cure53/DOMPurify/commit/ca30f0… | x_refsource_MISC |
| https://github.com/cure53/DOMPurify/releases/tag/3.4.7 | x_refsource_MISC |
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CVE-2026-49459 (GCVE-0-2026-49459)
Vulnerability from nvd – Published: 2026-07-14 20:01 – Updated: 2026-07-15 14:17
VLAI
EPSS
VEX
Title
DOMPurify: IN_PLACE mode preserves attributes of a clobbered root element, allowing XSS via attacker-controlled root DOM
Summary
DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.6, DOMPurify.sanitize(root, { IN_PLACE: true }) could preserve event-handler attributes on an attacker-controlled <form> root when a descendant name clobbered properties checked by _isClobbered, because _forceRemove no-opped on the parent-less root and _sanitizeAttributes returned early. This issue is fixed in version 3.4.6.
Severity
6.1 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | x_refsource_CONFIRM |
| https://github.com/cure53/DOMPurify/commit/bb7739… | x_refsource_MISC |
| https://github.com/cure53/DOMPurify/releases/tag/3.4.6 | x_refsource_MISC |
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CVE-2026-49458 (GCVE-0-2026-49458)
Vulnerability from nvd – Published: 2026-07-14 19:58 – Updated: 2026-07-15 13:03
VLAI
EPSS
VEX
Title
DOMPurify: Cross-realm IN_PLACE sanitization leaves executable markup intact via realm-bound `instanceof` checks
Summary
DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.6, DOMPurify.sanitize(node, { IN_PLACE: true }) accepted same-origin foreign-realm DOM nodes while follow-on checks used parent-realm constructors, causing instanceof checks for forms, named node maps, document fragments, and elements to fail and skip clobber, template-content, and shadow-DOM sanitization branches so executable markup could survive. This issue is fixed in version 3.4.6.
Severity
6.1 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | x_refsource_CONFIRM |
| https://github.com/cure53/DOMPurify/commit/bb7739… | x_refsource_MISC |
| https://github.com/cure53/DOMPurify/releases/tag/3.4.6 | x_refsource_MISC |
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CVE-2026-47423 (GCVE-0-2026-47423)
Vulnerability from nvd – Published: 2026-07-14 19:56 – Updated: 2026-07-16 14:47
VLAI
EPSS
VEX
Title
DOMPurify XSS via `selectedcontent` re-clone
Summary
DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. In 3.4.4, DOMPurify allowed selectedcontent by default, allowing browsers to re-clone an XSS payload after sanitization so that unsanitized markup inside <selectedcontent> is returned. This issue is fixed in version 3.4.5.
Severity
8.2 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | x_refsource_CONFIRM |
| https://github.com/cure53/DOMPurify/commit/011b0c… | x_refsource_MISC |
| https://github.com/cure53/DOMPurify/releases/tag/3.4.5 | x_refsource_MISC |
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CVE-2026-65914 (GCVE-0-2026-65914)
Vulnerability from cvelistv5 – Published: 2026-07-23 13:16 – Updated: 2026-07-23 13:57
VLAI
EPSS
VEX
Title
DOMPurify before 3.3.2 Mutation XSS via Re-Contextualization
Summary
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 context during reparsing, reactivating dangerous markup with event handlers to execute JavaScript.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
| https://www.vulncheck.com/advisories/dompurify-be… | third-party-advisory |
Impacted products
Date Public
2026-03-25 00:00
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CVE-2026-65913 (GCVE-0-2026-65913)
Vulnerability from cvelistv5 – Published: 2026-07-23 13:16 – Updated: 2026-07-23 13:38
VLAI
EPSS
VEX
Title
DOMPurify before 3.3.2 Prototype Pollution via USE_PROFILES
Summary
DOMPurify before 3.3.2 contains a prototype pollution vulnerability in USE_PROFILES 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 allowlisted attributes and resulting in DOM-based XSS when sanitized markup is rendered.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
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Impacted products
Date Public
2026-04-01 00:00
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CVE-2026-65912 (GCVE-0-2026-65912)
Vulnerability from cvelistv5 – Published: 2026-07-23 13:16 – Updated: 2026-07-23 15:46
VLAI
EPSS
VEX
Title
DOMPurify before 3.3.2 URI Validation Bypass via ADD_ATTR
Summary
DOMPurify before 3.3.2 contains a URI validation bypass vulnerability when ADD_ATTR is provided as a predicate function via EXTRA_ELEMENT_HANDLING.attributeCheck. Attackers can supply a predicate that accepts specific attribute and tag combinations to bypass URI-safe validation, allowing unsafe protocols like javascript: to survive sanitization and execute as DOM-based XSS when the link is activated.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
| https://www.vulncheck.com/advisories/dompurify-be… | third-party-advisory |
Impacted products
Date Public
2026-04-01 00:00
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CVE-2026-65911 (GCVE-0-2026-65911)
Vulnerability from cvelistv5 – Published: 2026-07-23 13:16 – Updated: 2026-07-23 13:16
VLAI
EPSS
VEX
Title
DOMPurify before 3.4.0 XSS via ADD_ATTR/ADD_TAGS State Leakage
Summary
In DOMPurify through 3.3.3, function predicates supplied via ADD_ATTR or ADD_TAGS to DOMPurify.sanitize() persist in internal state (EXTRA_ELEMENT_HANDLING) across subsequent sanitize() calls on the same instance. If a later call on the same instance provides ADD_ATTR or ADD_TAGS as an array rather than a function, the previously set function handler is neither cleared nor overwritten, so it continues to approve attacker-controlled attributes or tags. This can allow dangerous event-handler attributes or forbidden tags (bypassing FORBID_TAGS) to survive sanitization, resulting in cross-site scripting. The vendor (Cure53) considers this an edge case outside DOMPurify's threat model; the referenced advisory lists 3.4.0 as the patched version.
Severity
6.1 (Medium)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
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Impacted products
Date Public
2026-04-01 00:00
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CVE-2026-65904 (GCVE-0-2026-65904)
Vulnerability from cvelistv5 – Published: 2026-07-23 13:16 – Updated: 2026-07-23 15:46
VLAI
EPSS
VEX
Title
DOMPurify before 3.4.4 Cross-Site Scripting via IN_PLACE mode
Summary
DOMPurify through 3.3.3 fails to sanitize DOM elements passed via IN_PLACE 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 stringify the element (yielding '[object HTMLDivElement]'), silently reset IN_PLACE to false, and return the unsanitized element unchanged with any XSS payloads intact. The vendor considers this an edge case outside DOMPurify's threat model and, at time of publication, no fix was planned.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
| https://www.vulncheck.com/advisories/dompurify-be… | third-party-advisory |
Impacted products
Date Public
2026-04-01 00:00
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CVE-2026-65903 (GCVE-0-2026-65903)
Vulnerability from cvelistv5 – Published: 2026-07-23 13:16 – Updated: 2026-07-23 15:35
VLAI
EPSS
VEX
Title
DOMPurify before 3.4.0 ADD_TAGS Function Bypasses FORBID_TAGS
Summary
DOMPurify before 3.4.0 contains a logic error in the ADD_TAGS function where short-circuit evaluation allows forbidden tags to bypass FORBID_TAGS restrictions. Attackers can craft input containing tags listed in FORBID_TAGS that are also added via ADD_TAGS function, causing them to be retained in sanitized output.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-697 - Incorrect Comparison
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
| https://www.vulncheck.com/advisories/dompurify-be… | third-party-advisory |
Impacted products
Date Public
2026-04-15 00:00
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CVE-2026-65902 (GCVE-0-2026-65902)
Vulnerability from cvelistv5 – Published: 2026-07-23 13:16 – Updated: 2026-07-23 13:58
VLAI
EPSS
VEX
Title
DOMPurify before 3.4.7 Hook Mutation Pollution via allowedTags
Summary
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.
Severity
6.1 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-501 - Trust Boundary Violation
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
| https://github.com/cure53/DOMPurify/commit/7996f1… | patch |
| https://www.vulncheck.com/advisories/dompurify-be… | third-party-advisory |
Impacted products
Date Public
2026-05-26 00:00
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CVE-2026-65901 (GCVE-0-2026-65901)
Vulnerability from cvelistv5 – Published: 2026-07-23 13:16 – Updated: 2026-07-23 13:39
VLAI
EPSS
VEX
Title
DOMPurify 3.4.6 Cross-Site Scripting via IN_PLACE nodeName
Summary
DOMPurify through 3.4.6 contains a cross-site scripting vulnerability in IN_PLACE 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, causing scripts to execute when the sanitized tree is inserted into a live document.
Severity
6.1 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
| https://www.vulncheck.com/advisories/dompurify-cr… | third-party-advisory |
Date Public
2026-05-27 00:00
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CVE-2026-65900 (GCVE-0-2026-65900)
Vulnerability from cvelistv5 – Published: 2026-07-23 13:16 – Updated: 2026-07-23 18:02
VLAI
EPSS
VEX
Title
DOMPurify before 3.4.8 Template Expression Injection via RETURN_DOM
Summary
DOMPurify versions >=3.0.0 and before 3.4.8, when configured with SAFE_FOR_TEMPLATES together with a DOM output mode (RETURN_DOM, RETURN_DOM_FRAGMENT, or IN_PLACE), fail to strip template expressions (e.g. ${evil}, {{evil}}, <%evil%>) inside <template> element content. The final normalization/scrub pass (_scrubTemplateExpressions) uses a NodeIterator and node.normalize() that do not descend into template.content, so expressions that only form after adjacent text nodes merge survive sanitization. This bypasses SAFE_FOR_TEMPLATES and can allow a downstream template engine to evaluate attacker-supplied expressions. The string output path is not affected.
Severity
6.1 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
| https://www.vulncheck.com/advisories/dompurify-be… | third-party-advisory |
Impacted products
Date Public
2026-05-29 00:00
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CVE-2026-65899 (GCVE-0-2026-65899)
Vulnerability from cvelistv5 – Published: 2026-07-23 13:16 – Updated: 2026-07-23 13:16
VLAI
EPSS
VEX
Title
DOMPurify before 3.4.9 Trusted Types Policy State Contamination
Summary
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.
Severity
6.1 (Medium)
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
| https://github.com/cure53/DOMPurify/commit/825e61… | patch |
| https://www.vulncheck.com/advisories/dompurify-be… | third-party-advisory |
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Date Public
2026-06-10 00:00
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CVE-2026-65898 (GCVE-0-2026-65898)
Vulnerability from cvelistv5 – Published: 2026-07-23 13:16 – Updated: 2026-07-23 15:47
VLAI
EPSS
VEX
Title
DOMPurify before 3.4.11 Permanent Attribute Allowlist Pollution via setConfig
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | vendor-advisory |
| https://www.vulncheck.com/advisories/dompurify-be… | third-party-advisory |
Impacted products
Date Public
2026-06-17 00:00
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CVE-2026-49978 (GCVE-0-2026-49978)
Vulnerability from cvelistv5 – Published: 2026-07-14 20:02 – Updated: 2026-07-21 14:59
VLAI
EPSS
VEX
Title
DOMPurify IN_PLACE Sanitization Bypass via Attached Shadow Root Inside <template>.content
Summary
DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.7, DOMPurify IN_PLACE sanitization could skip shadow contents attached to an element inside <template>.content, allowing attacker-controlled markup such as event handlers, JavaScript URLs, or scripts to survive and execute when an application cloned and inserted the sanitized template. This issue is fixed in version 3.4.7.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | x_refsource_CONFIRM |
| https://github.com/cure53/DOMPurify/commit/ca30f0… | x_refsource_MISC |
| https://github.com/cure53/DOMPurify/releases/tag/3.4.7 | x_refsource_MISC |
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CVE-2026-49459 (GCVE-0-2026-49459)
Vulnerability from cvelistv5 – Published: 2026-07-14 20:01 – Updated: 2026-07-15 14:17
VLAI
EPSS
VEX
Title
DOMPurify: IN_PLACE mode preserves attributes of a clobbered root element, allowing XSS via attacker-controlled root DOM
Summary
DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.6, DOMPurify.sanitize(root, { IN_PLACE: true }) could preserve event-handler attributes on an attacker-controlled <form> root when a descendant name clobbered properties checked by _isClobbered, because _forceRemove no-opped on the parent-less root and _sanitizeAttributes returned early. This issue is fixed in version 3.4.6.
Severity
6.1 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | x_refsource_CONFIRM |
| https://github.com/cure53/DOMPurify/commit/bb7739… | x_refsource_MISC |
| https://github.com/cure53/DOMPurify/releases/tag/3.4.6 | x_refsource_MISC |
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CVE-2026-49458 (GCVE-0-2026-49458)
Vulnerability from cvelistv5 – Published: 2026-07-14 19:58 – Updated: 2026-07-15 13:03
VLAI
EPSS
VEX
Title
DOMPurify: Cross-realm IN_PLACE sanitization leaves executable markup intact via realm-bound `instanceof` checks
Summary
DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.6, DOMPurify.sanitize(node, { IN_PLACE: true }) accepted same-origin foreign-realm DOM nodes while follow-on checks used parent-realm constructors, causing instanceof checks for forms, named node maps, document fragments, and elements to fail and skip clobber, template-content, and shadow-DOM sanitization branches so executable markup could survive. This issue is fixed in version 3.4.6.
Severity
6.1 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | x_refsource_CONFIRM |
| https://github.com/cure53/DOMPurify/commit/bb7739… | x_refsource_MISC |
| https://github.com/cure53/DOMPurify/releases/tag/3.4.6 | x_refsource_MISC |
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CVE-2026-47423 (GCVE-0-2026-47423)
Vulnerability from cvelistv5 – Published: 2026-07-14 19:56 – Updated: 2026-07-16 14:47
VLAI
EPSS
VEX
Title
DOMPurify XSS via `selectedcontent` re-clone
Summary
DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. In 3.4.4, DOMPurify allowed selectedcontent by default, allowing browsers to re-clone an XSS payload after sanitization so that unsanitized markup inside <selectedcontent> is returned. This issue is fixed in version 3.4.5.
Severity
8.2 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/cure53/DOMPurify/security/advi… | x_refsource_CONFIRM |
| https://github.com/cure53/DOMPurify/commit/011b0c… | x_refsource_MISC |
| https://github.com/cure53/DOMPurify/releases/tag/3.4.5 | x_refsource_MISC |
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"url": "https://github.com/cure53/DOMPurify/security/advisories/GHSA-87xg-pxx2-7hvx"
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"title": "CISA ADP Vulnrichment"
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"value": "DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. In 3.4.4, DOMPurify allowed selectedcontent by default, allowing browsers to re-clone an XSS payload after sanitization so that unsanitized markup inside \u003cselectedcontent\u003e is returned. This issue is fixed in version 3.4.5."
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{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
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"references": [
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"name": "https://github.com/cure53/DOMPurify/security/advisories/GHSA-87xg-pxx2-7hvx",
"tags": [
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],
"url": "https://github.com/cure53/DOMPurify/security/advisories/GHSA-87xg-pxx2-7hvx"
},
{
"name": "https://github.com/cure53/DOMPurify/commit/011b0c78f2a0f57ee54f5fcccb697a46ca6e63ea",
"tags": [
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"url": "https://github.com/cure53/DOMPurify/commit/011b0c78f2a0f57ee54f5fcccb697a46ca6e63ea"
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{
"name": "https://github.com/cure53/DOMPurify/releases/tag/3.4.5",
"tags": [
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"url": "https://github.com/cure53/DOMPurify/releases/tag/3.4.5"
}
],
"source": {
"advisory": "GHSA-87xg-pxx2-7hvx",
"discovery": "UNKNOWN"
},
"title": "DOMPurify XSS via `selectedcontent` re-clone"
}
},
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"datePublished": "2026-07-14T19:56:02.057Z",
"dateReserved": "2026-05-19T19:37:43.526Z",
"dateUpdated": "2026-07-16T14:47:21.564Z",
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