Medium severity · published Jun 8, 2026
CVE-2026-47345
TYPO3 HTML Sanitizer allows Cross-Site Scripting
5.1
CVSS
0.5%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HS
HTML Sanitizer · TYPO3
before 2.3.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-47345
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-47345
github.com
https://github.com/TYPO3/html-sanitizer/commit/8b5d0be44ded457ca993ec9ca93d859941c63764
typo3.org
https://typo3.org/security/advisory/typo3-core-sa-2026-006
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