TYPO3 HTML Sanitizer allows Cross-Site Scripting_CVE-2026-47345

5.1 / 10

MEDIUM

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

Description

Namespace attributes are not encoded correctly during HTML serialization. This allows bypassing the cross-site scripting prevention mechanism of typo3/html-sanitizer before version 2.3.2.

Basic Information

ID CVE-2026-47345

Source TYPO3

Published Jun 8, 2026 at 19:04

Modified Jun 8, 2026 at 19:06

Affected Product

Vendor TYPO3

Product HTML Sanitizer

Affected Versions TYPO3 HTML Sanitizer 0

CWE Classification

CWE-79

References

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    "lastseen": "",
    "description": "Namespace attributes are not encoded correctly during HTML serialization. This allows bypassing the cross-site scripting prevention mechanism of typo3/html-sanitizer before version 2.3.2.",
    "published": "2026-06-08T19:04:08.337Z",
    "modified": "2026-06-08T19:06:11.091Z",
    "type": "cve",
    "title": "TYPO3 HTML Sanitizer allows Cross-Site Scripting",
    "source": "TYPO3",
    "references": "https://typo3.org/security/advisory/typo3-core-sa-2026-006\nhttps://github.com/TYPO3/html-sanitizer/commit/8b5d0be44ded457ca993ec9ca93d859941c63764",
    "id": "CVE-2026-47345",
    "bulletinFamily": "",
    "cwe": [
        "CWE-79"
    ],
    "cvelist": null,
    "sourceData": "TYPO3 HTML Sanitizer 0",
    "sourceHref": "",
    "cvss": {
        "score": 5.1,
        "severity": "MEDIUM",
        "vector": "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",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
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            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "HTML Sanitizer",
    "version": "0",
    "vendor": "TYPO3",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}