CVE-2026-47346
CVE-2026-47346 is a high-severity vulnerability with a CVSS 4.0 base score of 7.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-178.
Key facts
- Severity: High (CVSS 4.0 base score 7.6)
- EPSS exploit prediction: 0% (17th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-35393
- Weakness: CWE-178
- Published:
- Last modified:
Description
Backend users with file write permissions were able to upload form definition files with mixed-case extensions (e.g., .FORM.YAML) to bypass the Form Framework's upload restriction. Maliciously crafted form definition files can be used to execute arbitrary SQL statements, allowing attackers to escalate privileges by creating administrative backend user accounts. This issue affects TYPO3 CMS versions before 10.4.57, 11.0.0-11.5.50, 12.0.0-12.4.45, 13.0.0-13.4.30 and 14.0.0-14.3.2.
Frequently asked questions
- What is CVE-2026-47346?
- Backend users with file write permissions were able to upload form definition files with mixed-case extensions (e.g., .FORM.YAML) to bypass the Form Framework's upload restriction. Maliciously crafted form definition files can be used to execute arbitrary SQL statements, allowing attackers to escalate privileges by creating administrative backend user accounts. This issue affects TYPO3 CMS versions before 10.4.57, 11.0.0-11.5.50, 12.0.0-12.4.45, 13.0.0-13.4.30 and 14.0.0-14.3.2.
- How severe is CVE-2026-47346?
- CVE-2026-47346 has a CVSS 4.0 base score of 7.6, rated high severity.
- Is CVE-2026-47346 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-47346?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-47346 have an EU (EUVD) identifier?
- Yes. CVE-2026-47346 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35393.
- When was CVE-2026-47346 published?
- CVE-2026-47346 was published on 2026-06-09 and last updated on 2026-06-17.
References
- https://github.com/TYPO3/typo3/commit/2030617e6f273cee7b756c695f0a48a45a31eb47
- https://github.com/TYPO3/typo3/commit/eb2b2251d90339d3ab55df3d4c0378ae0c780b45
- https://typo3.org/security/advisory/typo3-core-sa-2026-008
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