CVE-2026-47345

mediumpriority · track · 0EPSS 0.005 · 41 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.47% (41st) EPSS

CVSS 5.1 · medium

Is it mine?

12 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · osv

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

5.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.2–5.1

v4.05.1mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:Nsecondary · ENISA EU

v4.05.1mediumCVSS:4.0/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:Xsecondary

v4.01.2lowCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/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:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USCWE-79US

affected products (12)

Products and version ranges known to be affected.

TYPO3 Core <10.4.57 ELTSall versionscert_bundDE
TYPO3 Core <11.5.51 ELTSall versionscert_bundDE
TYPO3 Core <12.4.46 ELTSall versionscert_bundDE
TYPO3 Core <13.4.31 LTSall versionscert_bundDE
TYPO3 Core <14.3.3 LTSall versionscert_bundDE
TYPO3 Core< 10.4.57 ELTScert_bundDE
TYPO3 Core< 11.5.51 ELTScert_bundDE
TYPO3 Core< 12.4.46 ELTScert_bundDE
TYPO3 Core< 13.4.31 LTScert_bundDE
TYPO3 Core< 14.3.3 LTScert_bundDE
TYPO3 HTML Sanitizer0 → 2.3.2enisa_euvdEU
Packagist typo3/html-sanitizer< 2.3.2osvUSpkg:composer/typo3/html-sanitizer

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1835TYPO3 Core: Mehrere SchwachstellenDeutsch2026-06-08csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in TYPO3 Core ausnutzen, um Sicherheitsbeschränkungen zu umgehen, Benutzer auf schädliche Websites umzuleiten, beliebigen Code auszuführen, Berechtigungen zu eskalieren oder andere Auswirkungen zu verursachen.
GHSA-p5j5-4j3q-8mq8TYPO3 HTML Sanitizer allows Cross-site Scripting2026-06-12ghsa · osvUS
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. Credits to Doyensec in collaboration with Claude and Anthropic Research for reporting this vulnerability.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund osv NVD CVE.org MITRE

published 2026-06-08modified 2026-07-23

references (6)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan