CVE-2026-47348: Typo3/cms core Cross-Site Scripting Vulnerability
MODERATECVE-2026-47348 is a MODERATE cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Typo3/cms core libraries in the Packagist ecosystem. The issue involves typo3 cms has cross-site scripting in indexed search. Remediation is available by upgrading affected packages to version 13.4.31, 14.3.3.
CVE-2026-47348 at a Glance
How to Fix CVE-2026-47348
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 13.4.31Upgrade typo3/cms-core to 14.3.3Upgrade typo3/cms-indexed-search to 13.4.31Upgrade typo3/cms-indexed-search 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-2026-47348, 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 13.4.31), 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-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. 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-2026-47348 Affected Typo3/cms core Versions
4 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
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
|
|
typo3/cms-indexed-search
|
Packagist |
≥ 13.0.0
< 13.4.31
|
13.4.31
|
|
typo3/cms-indexed-search
|
Packagist |
≥ 14.0.0
< 14.3.3
|
14.3.3
|
References
Frequently Asked Questions
What is CVE-2026-47348?
Which Typo3/cms core versions are affected?
What version fixes CVE-2026-47348?
Is typo3/cms-core affected?
Is typo3/cms-indexed-search affected?
What CWE is associated with CVE-2026-47348?
How can I check Packagist dependencies for CVE-2026-47348?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-cg75-qfg2-w9hj",
"modified" : "2026-06-12T19:06:52Z",
"published" : "2026-06-12T19:06:52Z",
"aliases" : [ "CVE-2026-47348" ],
"summary" : "TYPO3 CMS has Cross-Site Scripting in Indexed Search",
"details" : "### Problem\nEditors with access to create or modify page content were able to include HTML markup in page titles that were stored in the search index without sanitization. When displayed in frontend search results via the Indexed Search plugin, these titles were rendered without proper output encoding, resulting in a Cross-Site Scripting vulnerability.\n\n### Solution\nUpdate to TYPO3 versions 13.4.31 LTS, 14.3.3 LTS that fix the problem described.\n\n### Credits\nTYPO3 CMS thanks Jan Kahmen and Sanjay Singh Jhala for reporting this issue, and to TYPO3 core & security team member Oliver Hader for fixing it.\n\n### Resources\n* [TYPO3-CORE-SA-2026-010](https://typo3.org/security/advisory/typo3-core-sa-2026-010)",
"severity" : [ {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:N/SI:L/SA:N"
} ],
"affected" : [ {
"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"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "typo3/cms-indexed-search"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "13.0.0"
}, {
"fixed" : "13.4.31"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "typo3/cms-indexed-search"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "14.0.0"
}, {
"fixed" : "14.3.3"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/TYPO3/typo3/security/advisories/GHSA-cg75-qfg2-w9hj"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-47348"
}, {
"type" : "WEB",
"url" : "https://github.com/TYPO3/typo3/commit/2e96dd0e9fab7ad877b741fb9f6fc645b4270a3e"
}, {
"type" : "WEB",
"url" : "https://github.com/TYPO3/typo3/commit/8004b91a5951cfe01dda8554f77d0daa82d6b899"
}, {
"type" : "WEB",
"url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2026-47348.yaml"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/TYPO3/typo3"
}, {
"type" : "WEB",
"url" : "https://typo3.org/security/advisory/typo3-core-sa-2026-010"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-79" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2026-06-12T19:06:52Z",
"nvd_published_at" : "2026-06-09T11:16:52Z"
}
}