CVE-2026-47345

TYPO3 HTML Sanitizer allows Cross-Site Scripting

CVSS 5.1 MEDIUMEPSS 0.4%CWE-79

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.1EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

08 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

TYPO3 · HTML Sanitizer

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References

https://github.com/TYPO3/html-sanitizer/commit/8b5d0be44ded457ca993ec9ca93d859941c63764 https://typo3.org/security/advisory/typo3-core-sa-2026-006