GitHub Advisoryadvisory · Packagist

GHSA-jvf5-rxvv-3mcg TYPO3 HTML Sanitizer allows Cross-site Scripting

LOW Published 2026-06-12 Modified 2026-06-12 Official page ↗
Aliases
CVE-2026-47344
Ecosystem
Packagist
Packages
typo3/html-sanitizer
Severity
Low
CVSS vector
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
Weaknesses
CWE-79
Reviewed
2026-06-12

Affected packages

• Packagist typo3/html-sanitizer: < 2.3.2 → fixed in 2.3.2

Description

When `ALLOW_INSECURE_RAW_TEXT` is enabled, whitespace-variant closing tags (e.g., ``) 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.

Related

Alias · CVE (1)

  • CVE-2026-47344 When ALLOW_INSECURE_RAW_TEXT is enabled, whitespace-variant closing tags (e.g., </style\t>) are not recognized by the sanitizer but… vulnerability

Weakness · CWE (1)

  • CWE-79 Improper Neutralization of Input During Web Page Generation weakness

References