{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-57531", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-06-24T15:58:58.538Z", "datePublished": "2026-07-24T19:10:05.984Z", "dateUpdated": "2026-07-24T19:10:05.984Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-07-24T19:10:05.984Z"}, "title": "Milkdown < 7.21.3 DOM XSS via innerHTML Assignment", "descriptions": [{"lang": "en", "value": "Milkdown before 7.21.3 contains a DOM cross-site scripting vulnerability in the @milkdown/plugin-emoji package that allows unauthenticated attackers to execute arbitrary JavaScript in the host application's origin by causing a victim to paste attacker-controlled content. The parseDOM.getAttrs handler stores raw innerHTML of pasted span elements with data-type=\"emoji\" without sanitization, and the toMarkdown runner subsequently assigns this unsanitized value directly to a live DOM element's innerHTML, bypassing the DOMPurify sanitization used in the toDOM path, causing payload execution on every markdown serialization cycle."}], "tags": ["x_open-source"], "datePublic": "2026-07-12T00:00:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-79", "description": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}], "affected": [{"defaultStatus": "affected", "vendor": "Milkdown", "product": "milkdown", "packageURL": "pkg:github/Milkdown/milkdown", "repo": "https://github.com/Milkdown/milkdown", "versions": [{"status": "affected", "version": "0", "versionType": "semver", "lessThan": "7.21.3"}]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 5.1, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE", "version": "3.1", "baseSeverity": "MEDIUM", "baseScore": 5.4, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"}}], "references": [{"url": "https://github.com/Milkdown/milkdown/releases/tag/v7.21.3", "name": "Release Notes", "tags": ["release-notes"]}, {"url": "https://github.com/Milkdown/milkdown/pull/2410", "name": "Pull Request", "tags": ["issue-tracking"]}, {"url": "https://github.com/Milkdown/milkdown/commit/db1ae721854a0ab2f188b83cf8695702966640f1", "name": "Patch Commit", "tags": ["patch"]}, {"url": "https://www.npmjs.com/package/@milkdown/plugin-emoji", "name": "@milkdown/plugin-emoji", "tags": ["product"]}, {"url": "https://www.vulncheck.com/advisories/milkdown-dom-xss-via-innerhtml-assignment", "tags": ["third-party-advisory"]}], "credits": [{"lang": "en", "value": "Katriel Moses", "type": "finder"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "vulncheck"}}}}

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