CVE-2026-47343: TYPO3 CMS Destructive Actions On File Mount Vulnerability
HIGHCVE-2026-47343 is a HIGH destructive actions on file mount vulnerability (CWE-862: Missing Authorization) affecting TYPO3 CMS libraries in the Packagist ecosystem. The issue involves destructive actions on file mount folders. Remediation is available by upgrading affected packages to version 11.5.51, 12.4.46, 13.4.31, 14.3.3, 10.4.57.
CVE-2026-47343 at a Glance
How to Fix CVE-2026-47343
To remediate this vulnerability, upgrade all affected TYPO3 CMS 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 11.5.51Upgrade typo3/cms-core to 12.4.46Upgrade typo3/cms-core to 13.4.31Upgrade typo3/cms-core to 14.3.3Upgrade typo3/cms-core to 10.4.57Run 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-2026-47343, inspect your project dependencies for TYPO3 CMS:
inspect dependencies for typo3/cms-coreAnalyze the terminal output to locate any version of TYPO3 CMS in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 11.5.51), 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, 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-2026-47343 Affected TYPO3 CMS Versions
5 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
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
|
|
typo3/cms-core
|
Packagist |
< 10.4.57
|
10.4.57
|
References
Frequently Asked Questions
What is CVE-2026-47343?
Which TYPO3 CMS versions are affected?
What version fixes CVE-2026-47343?
Is typo3/cms-core affected?
What CWE is associated with CVE-2026-47343?
How can I check Packagist dependencies for CVE-2026-47343?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-3v8v-4wg6-r7qh",
"modified" : "2026-06-12T20:07:53Z",
"published" : "2026-06-12T20:07:52Z",
"aliases" : [ "CVE-2026-47343" ],
"summary" : "TYPO3 CMS: Destructive Actions on File Mount Folders",
"details" : "### Problem\nNon-privileged backend users with file mount access were able to perform write operations (move, delete, rename) on folders representing the root of an active file mount due to missing authorization restrictions.\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 Arne Uplegger for reporting this issue, and TYPO3 security team member Elias Häußler for fixing it.\n\n### Resources\n* [TYPO3-CORE-SA-2026-007](https://typo3.org/security/advisory/typo3-core-sa-2026-007)",
"severity" : [ {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/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-3v8v-4wg6-r7qh"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-47343"
}, {
"type" : "WEB",
"url" : "https://github.com/TYPO3/typo3/commit/504e72470ff72aaf5d2256878bf473747f389798"
}, {
"type" : "WEB",
"url" : "https://github.com/TYPO3/typo3/commit/ac4125aef8b9b94528a7f74db2444db57b05a87b"
}, {
"type" : "WEB",
"url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2026-47343.yaml"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/TYPO3/typo3"
}, {
"type" : "WEB",
"url" : "https://typo3.org/security/advisory/typo3-core-sa-2026-007"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-862" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2026-06-12T20:07:52Z",
"nvd_published_at" : "2026-06-09T11:16:52Z"
}
}