CVE-2026-47344
TYPO3 HTML Sanitizer allows Cross-site Scripting
EPSS 0.28%
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. Credits to IPC Labs for reporting this vulnerability.
How to fix CVE-2026-47344
To remediate CVE-2026-47344, upgrade the affected package to a fixed version below.
- Packagist/typo3/html-sanitizer—upgrade to 2.3.2 or later
Is CVE-2026-47344 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 2.3.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | 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 |