CVE-2026-47347 TYPO3 CMS - Open Redirect in Core Utilities
Attackers can redirect users to external sites via flawed URL sanitization, enabling phishing attacks against TYPO3 CMS users.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-47347?
CVE-2026-47347 is a medium-severity vulnerability in TYPO3 CMS, published on 9 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Applications that use GeneralUtility::sanitizeLocalUrl to allow only local URLs are vulnerable to open redirect attacks if the URL is used after it has passed the aforementioned sanitization checks. This enables attackers to redirect users to external content and carry out phishing attacks. This issue affects TYPO3 CMS versions before 10.4.57, 11.0.0-11.5.50, 12.0.0-12.4.45, 13.0.0-13.4.30 and 14.0.0-14.3.2.
Weakness: CWE-601
Which versions are affected by CVE-2026-47347?
10 open source packages ship an affected version, including typo3/cms-core.
| Package | Affected | Fixed in |
|---|---|---|
typo3/cms-core Packagist | All versions | 10.4.57 |
typo3/cms-core Packagist | All versions | 10.4.57 |
typo3/cms-core Packagist | From 11.0.0 | 11.5.51 |
typo3/cms-core Packagist | From 11.0.0 | 11.5.51 |
typo3/cms-core Packagist | From 12.0.0 | 12.4.46 |
typo3/cms-core Packagist | From 12.0.0 | 12.4.46 |
4 more packages
typo3/cms-core Packagist | From 13.0.0 | 13.4.31 |
typo3/cms-core Packagist | From 13.0.0 | 13.4.31 |
typo3/cms-core Packagist | From 14.0.0 | 14.3.3 |
typo3/cms-core Packagist | From 14.0.0 | 14.3.3 |
How do I fix CVE-2026-47347?
Upgrade typo3/cms-core to a fixed version for your release line: 10.4.57, 11.5.51, 12.4.46 or 13.4.31.
Is CVE-2026-47347 being exploited?
There is no known exploitation of CVE-2026-47347 in the wild and no public exploit code.
Sources
Also known as GHSA-3p42-w5ch-gg42.