Vulnerability advisory
CVE-2026-47344
TYPO3 HTML Sanitizer allows Cross-Site Scripting
Also known as GHSA-jvf5-rxvv-3mcg
Severity
- CVSS 4.0
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
Affected versions
Repository
| Affected commits | Fixed by commit |
|---|---|
| GIT github.com/typo3/html-sanitizer ↗ | |
| All commits before 8b5d0be44ded457ca993ec9ca93d859941c63764 | 8b5d0be44ded457ca993ec9ca93d859941c63764 |
| Not specified | bd1a88d9b5a5f67f1120ec41084e9c1a0675641c |
Also listed as affected (25)
| |
Description
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.
References
- Webpackagist.org ↗
- Advisorygithub.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47344.json ↗
- Advisorynvd.nist.gov/vuln/detail/CVE-2026-47344 ↗
- Advisorytypo3.org/security/advisory/typo3-core-sa-2026-006 ↗
- Fixgithub.com/TYPO3/html-sanitizer/commit/bd1a88d9b5a5f67f1120ec41084e9c1a0675641c ↗
- Packagegithub.com/TYPO3/html-sanitizer ↗