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vuln-cve/data/2026/65xxx/CVE-2026-65911.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-65911",
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"state": "PUBLISHED",
"assignerShortName": "VulnCheck",
"dateReserved": "2026-07-23T12:51:09.595Z",
"datePublished": "2026-07-23T13:16:22.748Z",
"dateUpdated": "2026-07-27T16:20:37.732Z"
},
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"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck",
"dateUpdated": "2026-07-23T13:16:22.748Z"
},
"datePublic": "2026-04-01T00:00:00.000Z",
"title": "DOMPurify before 3.4.0 XSS via ADD_ATTR/ADD_TAGS State Leakage",
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"description": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
"cweId": "CWE-79",
"type": "CWE"
}
]
}
],
"affected": [
{
"vendor": "cure53",
"product": "DOMPurify",
"defaultStatus": "unaffected",
"packageURL": "pkg:npm/dompurify",
"versions": [
{
"version": "0",
"status": "affected",
"versionType": "semver",
"lessThan": "3.4.0"
},
{
"version": "3.4.0",
"status": "unaffected",
"versionType": "semver"
}
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}
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}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 5.1,
"baseSeverity": "MEDIUM",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "LOW",
"subIntegrityImpact": "LOW",
"userInteraction": "ACTIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS"
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"cvssV3_1": {
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"scope": "CHANGED",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
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"references": [
{
"url": "https://github.com/cure53/DOMPurify/security/advisories/GHSA-9p3w-6h5p-cv75",
"name": "GitHub Security Advisory (GHSA-9p3w-6h5p-cv75)",
"tags": [
"vendor-advisory"
]
},
{
"name": "VulnCheck Advisory: DOMPurify before 3.4.0 XSS via ADD_ATTR/ADD_TAGS State Leakage",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/dompurify-before-xss-via-add-attr-add-tags-state-leakage"
}
],
"credits": [
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"value": "offset",
"type": "reporter"
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"content": {
"timestamp": "2026-07-27T16:15:27.751831Z",
"id": "CVE-2026-65911",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-07-27T16:20:37.732Z"
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}
}