### Problem 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. ### Solution Update to TYPO3 versions 10.4.57 ELTS, 11.5.51 ELTS, 12.4.46 ELTS, 13.4.31 LTS, 14.3.3 LTS that fix the problem described. ### Credits TYPO3 CMS thanks Alexandre Romao for reporting this issue, and TYPO3 core & security team member Benjamin Franzke for fixing it. ### Resources * [TYPO3-CORE-SA-2026-009](https://typo3.org/security/advisory/typo3-core-sa-2026-009)
Update typo3/cms-core to 10.4.57; typo3/cms-core to 11.5.51; typo3/cms-core to 12.4.46; typo3/cms-core to 13.4.31; typo3/cms-core to 14.3.3 if you use the affected versions. Test the change in a non-production environment first.
Local check
hol-guard supply-chain scanTYPO3 CMS has an Open Redirect Vulnerability via Core Utilities affects typo3/cms-core (composer), typo3/cms-core (composer), typo3/cms-core (composer), typo3/cms-core (composer), typo3/cms-core (composer). Severity is medium. ### Problem 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. ### Solution Update to TYPO3 versions 10.4.57 ELTS, 11.5.51 ELTS, 12.4.46 ELTS, 13.4.31 LTS, 14.3.3 LTS that fix the problem described. ### Credits TYPO3 CMS thanks Alexandre Romao for reporting this issue, and TYPO3 core & security team member Benjamin Franzke for fixing it. ### Resources * [TYPO3-CORE-SA-2026-009](https://typo3.org/security/advisory/typo3-core-sa-2026-009)
AI coding agents often install or upgrade packages automatically in composer. A medium vulnerability in a dependency can be pulled into a project through a normal install or update without a human reviewing the change, expanding the blast radius from a single package to every agent workspace that depends on it.
| Package | Affected range |
|---|
### Problem 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. ### Solution Update to TYPO3 versions 10.4.57 ELTS, 11.5.51 ELTS, 12.4.46 ELTS, 13.4.31 LTS, 14.3.3 LTS that fix the problem described. ### Credits TYPO3 CMS thanks Alexandre Romao for reporting this issue, and TYPO3 core & security team member Benjamin Franzke for fixing it. ### Resources * [TYPO3-CORE-SA-2026-009](https://typo3.org/security/advisory/typo3-core-sa-2026-009)
Update typo3/cms-core to 10.4.57; typo3/cms-core to 11.5.51; typo3/cms-core to 12.4.46; typo3/cms-core to 13.4.31; typo3/cms-core to 14.3.3 if you use the affected versions. Test the change in a non-production environment first.
Local check
hol-guard supply-chain scanTYPO3 CMS has an Open Redirect Vulnerability via Core Utilities affects typo3/cms-core (composer), typo3/cms-core (composer), typo3/cms-core (composer), typo3/cms-core (composer), typo3/cms-core (composer). Severity is medium. ### Problem 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. ### Solution Update to TYPO3 versions 10.4.57 ELTS, 11.5.51 ELTS, 12.4.46 ELTS, 13.4.31 LTS, 14.3.3 LTS that fix the problem described. ### Credits TYPO3 CMS thanks Alexandre Romao for reporting this issue, and TYPO3 core & security team member Benjamin Franzke for fixing it. ### Resources * [TYPO3-CORE-SA-2026-009](https://typo3.org/security/advisory/typo3-core-sa-2026-009)
AI coding agents often install or upgrade packages automatically in composer. A medium vulnerability in a dependency can be pulled into a project through a normal install or update without a human reviewing the change, expanding the blast radius from a single package to every agent workspace that depends on it.
| Package | Affected range |
|---|
| Fixed version |
|---|
| typo3/cms-corecomposer | <10.4.57 | 10.4.57 |
|---|---|---|
| typo3/cms-corecomposer | >=11.0.0,<11.5.51 | 11.5.51 |
| typo3/cms-corecomposer | >=12.0.0,<12.4.46 | 12.4.46 |
| typo3/cms-corecomposer | >=13.0.0,<13.4.31 | 13.4.31 |
| typo3/cms-corecomposer | >=14.0.0,<14.3.3 | 14.3.3 |
Fixed versions are reported by the source feed; confirm compatibility before updating.
Reported by GitHub Security Advisories (ghsa).
HOL Guard can help your team review package activity against supported protection paths.
Explore HOL Guard| Fixed version |
|---|
| typo3/cms-corecomposer | <10.4.57 | 10.4.57 |
|---|---|---|
| typo3/cms-corecomposer | >=11.0.0,<11.5.51 | 11.5.51 |
| typo3/cms-corecomposer | >=12.0.0,<12.4.46 | 12.4.46 |
| typo3/cms-corecomposer | >=13.0.0,<13.4.31 | 13.4.31 |
| typo3/cms-corecomposer | >=14.0.0,<14.3.3 | 14.3.3 |
Fixed versions are reported by the source feed; confirm compatibility before updating.
Reported by GitHub Security Advisories (ghsa).
HOL Guard can help your team review package activity against supported protection paths.
Explore HOL Guard