CVE-2026-47345 | THREATINT

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 Reserved 2026-05-19 | Published 2026-06-08 | Updated 2026-06-08 | Assigner TYPO3

MEDIUM: 5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Default status

unaffected

Any version before 2.3.2

affected

Credits

Doyensec in collaboration with Claude and Anthropic Research reporter

Benjamin Franzke remediation developer

References

typo3.org/security/advisory/typo3-core-sa-2026-006 vendor-advisory

github.com/...ommit/8b5d0be44ded457ca993ec9ca93d859941c63764 patch

cve.org (CVE-2026-47345)

nvd.nist.gov (CVE-2026-47345)

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