CVE-2026-47344

When ALLOW_INSECURE_RAW_TEXT is enabled, whitespace-variant closing tags (e.g., </style\t>) are not recognized by the sanitizer but accepted by browsers as valid end tags, allowing subsequent content to escape sanitization. This allows bypassing the cross-site scripting prevention mechanism of typo3/html-sanitizer before version 2.3.2.

CVSS

No CVSS.

References

Link	Resource
https://github.com/TYPO3/html-sanitizer/commit/bd1a88d9b5a5f67f1120ec41084e9c1a0675641c
https://typo3.org/security/advisory/typo3-core-sa-2026-006

Configurations

No configuration.

History

08 Jun 2026, 20:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-08 20:17

Updated : 2026-06-17 10:54

NVD link : CVE-2026-47344

Mitre link : CVE-2026-47344

CVE.ORG link : CVE-2026-47344

JSON object : View

Products Affected

No product.

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CWE-436

Interpretation Conflict

{"id": "CVE-2026-47344", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-47344", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-08T19:50:27.408977Z"}}], "cvssMetricV40": [{"type": "Secondary", "source": "f4fb688c-4412-4426-b4b8-421ecf27b14a", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 2.1, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "LOW", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "PASSIVE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "subIntegrityImpact": "LOW", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "f4fb688c-4412-4426-b4b8-421ecf27b14a", "affectedData": [{"repo": "https://github.com/TYPO3/html-sanitizer", "vendor": "TYPO3", "product": "HTML Sanitizer", "versions": [{"status": "affected", "version": "0", "lessThan": "2.3.2", "versionType": "semver"}], "packageName": "typo3/html-sanitizer", "collectionURL": "https://packagist.org", "defaultStatus": "unaffected"}]}], "published": "2026-06-08T20:17:01.587", "references": [{"url": "https://github.com/TYPO3/html-sanitizer/commit/bd1a88d9b5a5f67f1120ec41084e9c1a0675641c", "source": "f4fb688c-4412-4426-b4b8-421ecf27b14a"}, {"url": "https://typo3.org/security/advisory/typo3-core-sa-2026-006", "source": "f4fb688c-4412-4426-b4b8-421ecf27b14a"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "f4fb688c-4412-4426-b4b8-421ecf27b14a", "description": [{"lang": "en", "value": "CWE-79"}, {"lang": "en", "value": "CWE-436"}]}], "descriptions": [{"lang": "en", "value": "When ALLOW_INSECURE_RAW_TEXT is enabled, whitespace-variant closing tags (e.g., </style\\t>) are not recognized by the sanitizer but accepted by browsers as valid end tags, allowing subsequent content to escape sanitization. This allows bypassing the cross-site scripting prevention mechanism of typo3/html-sanitizer before version 2.3.2."}], "lastModified": "2026-06-17T10:54:32.337", "sourceIdentifier": "f4fb688c-4412-4426-b4b8-421ecf27b14a"}