{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-100370", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-25T19:19:54.699Z", "datePublished": "2026-09-28T20:07:09.470Z", "dateUpdated": "2026-09-28T20:40:03.613Z"}, "containers": {"cna": {"title": "DOMSanitizer - Incomplete data: URL Sanitization in DOMSanitizer::isDangerousUrl() Allows Base64-Encoded Payloads to Bypass href and xlink:href Validation", "problemTypes": [{"descriptions": [{"cweId": "CWE-20", "lang": "en", "description": "CWE-20: Improper Input Validation", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/rhukster/dom-sanitizer/security/advisories/GHSA-wcj2-r6vg-rm97", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/rhukster/dom-sanitizer/security/advisories/GHSA-wcj2-r6vg-rm97"}, {"name": "https://github.com/rhukster/dom-sanitizer/commit/10f97807e4501d60f63987f2e76a38cdbf312dcb", "tags": ["x_refsource_MISC"], "url": "https://github.com/rhukster/dom-sanitizer/commit/10f97807e4501d60f63987f2e76a38cdbf312dcb"}, {"name": "https://github.com/rhukster/dom-sanitizer/commit/fb8f758b41134fc5fb2f563666f2330c69e31f94", "tags": ["x_refsource_MISC"], "url": "https://github.com/rhukster/dom-sanitizer/commit/fb8f758b41134fc5fb2f563666f2330c69e31f94"}, {"name": "https://github.com/rhukster/dom-sanitizer/releases/tag/1.0.15", "tags": ["x_refsource_MISC"], "url": "https://github.com/rhukster/dom-sanitizer/releases/tag/1.0.15"}], "affected": [{"vendor": "rhukster", "product": "dom-sanitizer", "versions": [{"version": "< 1.0.15", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-28T20:07:09.470Z"}, "descriptions": [{"lang": "en", "value": "DOMSanitizer is a DOM/SVG/MathML Sanitizer for PHP 7.3+. Prior to version 1.0.15, the isDangerousUrl() method is responsible for rejecting dangerous URL values in the href and xlink:href attributes. The weakness is that \"javascript:\" is rejected as a scheme, while \"data:\" is rejected only when the literal substring onload appears in the URL value (/^data:.*onload/i). Because data: payloads are routinely Base64-encoded, the dangerous content (<script>, event handlers, etc.) is invisible to that substring test. A URL such as data:text/html;base64,\u2026 therefore survives in href / xlink:href, even though the decoded payload is active markup. This is an incomplete input-validation / sanitization defect in the sanitizer itself. This issue has been patched in version 1.0.15."}], "source": {"advisory": "GHSA-wcj2-r6vg-rm97", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/rhukster/dom-sanitizer/security/advisories/GHSA-wcj2-r6vg-rm97", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-28T20:39:56.823996Z", "id": "CVE-2026-100370", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"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": "2026-09-28T20:40:03.613Z"}}]}}

{}

{}

{}

{}