CVE-2026-47347: Typo3/cms core TYPO3 CMS Has An Open Vulnerability
MODERATECVE-2026-47347 is a MODERATE typo3 cms has an open vulnerability (CWE-601: URL Redirection to Untrusted Site ('Open Redirect')) affecting Typo3/cms core libraries in the Packagist ecosystem. The issue involves typo3 cms has an open redirect vulnerability via core utilities. Remediation is available by upgrading affected packages to version 10.4.57, 11.5.51, 12.4.46, 13.4.31, 14.3.3.
CVE-2026-47347 at a Glance
How to Fix CVE-2026-47347
To remediate this vulnerability, upgrade all affected Typo3/cms core dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade typo3/cms-core to 10.4.57Upgrade typo3/cms-core to 11.5.51Upgrade typo3/cms-core to 12.4.46Upgrade typo3/cms-core to 13.4.31Upgrade typo3/cms-core to 14.3.3Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for typo3/cms-coreHow to Check if You Are Affected
To determine whether your application is affected by CVE-2026-47347, inspect your project dependencies for Typo3/cms core:
inspect dependencies for typo3/cms-coreAnalyze the terminal output to locate any version of Typo3/cms core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 10.4.57), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-601: URL Redirection to Untrusted Site ('Open Redirect'), where the web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect. In Typo3/cms core, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-47347 Affected Typo3/cms core Versions
5 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
typo3/cms-core
|
Packagist |
< 10.4.57
|
10.4.57
|
|
typo3/cms-core
|
Packagist |
≥ 11.0.0
< 11.5.51
|
11.5.51
|
|
typo3/cms-core
|
Packagist |
≥ 12.0.0
< 12.4.46
|
12.4.46
|
|
typo3/cms-core
|
Packagist |
≥ 13.0.0
< 13.4.31
|
13.4.31
|
|
typo3/cms-core
|
Packagist |
≥ 14.0.0
< 14.3.3
|
14.3.3
|
References
Frequently Asked Questions
What is CVE-2026-47347?
Which Typo3/cms core versions are affected?
What version fixes CVE-2026-47347?
Is typo3/cms-core affected?
What CWE is associated with CVE-2026-47347?
How can I check Packagist dependencies for CVE-2026-47347?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-3p42-w5ch-gg42",
"modified" : "2026-06-12T20:07:58Z",
"published" : "2026-06-12T20:07:58Z",
"aliases" : [ "CVE-2026-47347" ],
"summary" : "TYPO3 CMS has an Open Redirect Vulnerability via Core Utilities",
"details" : "### Problem\nApplications 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.\n\n### Solution\nUpdate 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.\n\n### Credits\nTYPO3 CMS thanks Alexandre Romao for reporting this issue, and TYPO3 core & security team member Benjamin Franzke for fixing it.\n\n### Resources\n* [TYPO3-CORE-SA-2026-009](https://typo3.org/security/advisory/typo3-core-sa-2026-009)",
"severity" : [ {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Packagist",
"name" : "typo3/cms-core"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "10.4.57"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "typo3/cms-core"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "11.0.0"
}, {
"fixed" : "11.5.51"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "typo3/cms-core"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "12.0.0"
}, {
"fixed" : "12.4.46"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "typo3/cms-core"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "13.0.0"
}, {
"fixed" : "13.4.31"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "typo3/cms-core"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "14.0.0"
}, {
"fixed" : "14.3.3"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/TYPO3/typo3/security/advisories/GHSA-3p42-w5ch-gg42"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-47347"
}, {
"type" : "WEB",
"url" : "https://github.com/TYPO3/typo3/commit/22c2dd5398ebc4cb7aa4aa37e02cb39181dee0cd"
}, {
"type" : "WEB",
"url" : "https://github.com/TYPO3/typo3/commit/3ffc0835012c6199db0e1dc4b56a77147d8600e0"
}, {
"type" : "WEB",
"url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2026-47347.yaml"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/TYPO3/typo3"
}, {
"type" : "WEB",
"url" : "https://typo3.org/security/advisory/typo3-core-sa-2026-009"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-601" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2026-06-12T20:07:58Z",
"nvd_published_at" : "2026-06-09T11:16:52Z"
}
}