PT-2026-47449 · Typo3 · Sanitize-Html

Benjamin Franzke · CVE-2026-47345 · Published 2026-06-08 · Updated 2026-07-23

Positive Technologies (AI Summary)

CVSS v4.0

5.1

Medium

Base vector

AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions typo3/html-sanitizer versions prior to 2.3.2

Description Namespace attributes are not encoded correctly during HTML serialization. This flaw allows the cross-site scripting prevention mechanism to be bypassed. Cross-site scripting is a technique where malicious scripts are injected into otherwise benign and trusted websites.

Recommendations Update to version 2.3.2 or later.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-47345

GHSA-P5J5-4J3Q-8MQ8

Affected Products

Sanitize-Html

References · 12

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47345.json · Exploit
• 🔥 https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/html-sanitizer/CVE-2026-47345.yaml · Exploit
• https://github.com/TYPO3/html-sanitizer/commit/8b5d0be44ded457ca993ec9ca93d859941c63764 · Patch
• https://osv.dev/vulnerability/GHSA-p5j5-4j3q-8mq8 · Vendor Advisory
• https://typo3.org/security/advisory/typo3-core-sa-2026-006 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-47345 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-47345 · Security Note
• https://github.com/TYPO3/html-sanitizer · Note
• https://github.com/TYPO3/html-sanitizer/security/advisories/GHSA-p5j5-4j3q-8mq8 · Note
• https://packagist.org · Note
• https://t.me/cveNotify/214688 · Telegram Post
• https://t.me/CVEtracker/56213 · Telegram Post