CVE-2026-47346Network attack vector

Administrative account creation via case-sensitive form-file validation

Published Jun 9, 2026 · Updated Jun 9, 2026

Broken access control in TYPO3 CMS Form Framework allows remote authenticated users to create administrative backend accounts. FilePersistenceSlot::isFormDefinition compares the .form.yaml suffix case-sensitively, so mixed-case filenames bypass the upload restriction. Exploitation requires backend access with file write permission; a crafted form definition then executes arbitrary SQL and creates an administrative account.

CVSS severity7.6
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Broken access control in TYPO3 CMS Form Framework allows remote authenticated users to create administrative backend accounts. FilePersistenceSlot::isFormDefinition compares the .form.yaml suffix case-sensitively, so mixed-case filenames bypass the upload restriction. Exploitation requires backend access with file write permission; a crafted form definition then executes arbitrary SQL and creates an administrative account.

The record

CVE
CVE-2026-47346
Published
Jun 9, 2026
Updated
Jun 9, 2026
Vendor
in2code GmbH
Product
TYPO3 CMS
Classifications
CWE-178, CWE-862, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <10.4.57
  2. Affected versionversion=11.0.0 <11.5.51
  3. Affected versionversion=12.0.0 <12.4.46
  4. Affected versionversion=13.0.0 <13.4.31
  5. Affected versionversion=14.0.0 <14.3.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

in2code GmbH · TYPO3 CMSversion=0 <10.4.57; version=11.0.0 <11.5.51; version=12.0.0 <12.4.46; version=13.0.0 <13.4.31; version=14.0.0 <14.3.3

Published CVSS scores

7.6TYPO3CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-178Improper Handling of Case Sensitivity
CWE-862Missing Authorization
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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