CVE-2026-47350: Typo3/cms core TYPO3 CMS Has Broken Access Vulnerability

MODERATE
Advisory Identifier: GHSA-qcmw-6rm2-5x78
Share
CWE-862
Published
Advisory Summary

CVE-2026-47350 is a MODERATE typo3 cms has broken access vulnerability (CWE-862: Missing Authorization) affecting Typo3/cms core libraries in the Packagist ecosystem. The issue involves typo3 cms has broken access control in its datahandler. Remediation is available by upgrading affected packages to version 13.4.31, 14.3.3.

CVE-2026-47350 at a Glance

CVE Identifier CVE-2026-47350
GHSA Identifier GHSA-qcmw-6rm2-5x78
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-862: Missing Authorization
Affected Product Typo3/cms core
Package Ecosystem Packagist
Published Date
Last Updated

How to Fix CVE-2026-47350

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.

typo3/cms-core fixed: 13.4.31 
Upgrade typo3/cms-core to 13.4.31
typo3/cms-core fixed: 14.3.3 
Upgrade typo3/cms-core to 14.3.3
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for typo3/cms-core

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-47350, inspect your project dependencies for Typo3/cms core:

inspect dependencies for typo3/cms-core

Analyze 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-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. 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

### Problem Backend users were able to move records to a different page without having edit permissions on the source page. ### Solution Update to TYPO3 versions 13.4.31 LTS, 14.3.3 LTS that fix the problem described. ### Credits TYPO3 CMS thanks Hyunseo Shin for reporting this issue, and TYPO3 security team member Torben Hansen for fixing it. ### Resources * [TYPO3-CORE-SA-2026-012](https://typo3.org/security/advisory/typo3-core-sa-2026-012)

CVE-2026-47350 Affected Typo3/cms core Versions

2 component(s)
Fixed Versions:
13.4.3114.3.3
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

References

GitHub Advisory / Wiki ADVISORY
https://github.com/TYPO3/typo3/security/advisories/GHSA-qcmw-6rm2-5x78
NVD — CVE-2026-47350 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-47350
Security Fix Commit FIX COMMIT
https://github.com/TYPO3/typo3/commit/195356996a60e40aeb2cd3e45a5f5c8940d5e116
Security Fix Commit FIX COMMIT
https://github.com/TYPO3/typo3/commit/c9898d2e67608eda78f8bd1f06ee9cf05a872a56
Typo3/cms core Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2026-47350.yaml
Typo3/cms core Source Repository REPOSITORY
https://github.com/TYPO3/typo3
Typo3/cms core Security Information SECURITY
https://typo3.org/security/advisory/typo3-core-sa-2026-012

Frequently Asked Questions

What is CVE-2026-47350?
CVE-2026-47350 is a security vulnerability in Typo3/cms core involving TYPO3 CMS has Broken Access Control in its DataHandler under CWE-862: Missing Authorization.
Which Typo3/cms core versions are affected?
Affected versions include releases prior to 13.4.31, 14.3.3 across affected packages: typo3/cms-core.
What version fixes CVE-2026-47350?
Upgrading to 13.4.31, 14.3.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is typo3/cms-core affected?
Yes, typo3/cms-core is affected in releases prior to 13.4.31, 14.3.3. Upgrade your dependency to 13.4.31, 14.3.3 or later.
What CWE is associated with CVE-2026-47350?
CVE-2026-47350 is classified under CWE-862: Missing Authorization (The product does not perform an authorization check when an actor attempts to access a resource or perform an action.).
How can I check Packagist dependencies for CVE-2026-47350?
Run the dependency tree command: 'inspect dependencies for typo3/cms-core'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-qcmw-6rm2-5x78",
  "modified" : "2026-06-12T19:32:15Z",
  "published" : "2026-06-12T19:32:15Z",
  "aliases" : [ "CVE-2026-47350" ],
  "summary" : "TYPO3 CMS has Broken Access Control in its DataHandler",
  "details" : "### Problem\nBackend users were able to move records to a different page without having edit permissions on the source page.\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 Hyunseo Shin for reporting this issue, and TYPO3 security team member Torben Hansen for fixing it.\n\n### Resources\n* [TYPO3-CORE-SA-2026-012](https://typo3.org/security/advisory/typo3-core-sa-2026-012)",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/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"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/TYPO3/typo3/security/advisories/GHSA-qcmw-6rm2-5x78"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-47350"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TYPO3/typo3/commit/195356996a60e40aeb2cd3e45a5f5c8940d5e116"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TYPO3/typo3/commit/c9898d2e67608eda78f8bd1f06ee9cf05a872a56"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2026-47350.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/TYPO3/typo3"
  }, {
    "type" : "WEB",
    "url" : "https://typo3.org/security/advisory/typo3-core-sa-2026-012"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-862" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-12T19:32:15Z",
    "nvd_published_at" : "2026-06-09T11:16:52Z"
  }
}