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CVE-2026-47347 TYPO3 CVE debrief

A medium-severity open redirect vulnerability, CVE-2026-47347, was found in TYPO3 CMS. The vulnerability occurs when applications use GeneralUtility::sanitizeLocalUrl to allow only local URLs, making them vulnerable to open redirect attacks if the URL is used after it has passed the aforementioned sanitization checks. This enables attackers to redirect users to external content and carry out phishing attacks. The vulnerability 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.

Vendor
TYPO3
Product
TYPO3 CMS
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-09
Advisory published
2026-06-09
Advisory updated
2026-06-09

Who should care

Administrators and users of 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 should apply the necessary patches to prevent exploitation.

Technical summary

The vulnerability has a CVSS score of 5.3 and is classified as CWE-601. It allows attackers to redirect users to external content, potentially leading to phishing attacks.

Defensive priority

Medium

Recommended defensive actions

  • Apply patches for 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.
  • Use secure URL sanitization practices.

Evidence notes

The CVE record and NVD detail can be found at [cve-org](https://www.cve.org/CVERecord?id=CVE-2026-47347) and [nvd](https://nvd.nist.gov/vuln/detail/CVE-2026-47347), respectively.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-47347 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-47347

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-47347 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-47347

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://github.com/TYPO3/typo3/commit/22c2dd5398ebc4cb7aa4aa37e02cb39181dee0cd

    f4fb688c-4412-4426-b4b8-421ecf27b14a

  • Source reference

    Unverified legacy reference

    URL: https://github.com/TYPO3/typo3/commit/3ffc0835012c6199db0e1dc4b56a77147d8600e0

    f4fb688c-4412-4426-b4b8-421ecf27b14a

  • Source reference

    Unverified legacy reference

    URL: https://typo3.org/security/advisory/typo3-core-sa-2026-009

    f4fb688c-4412-4426-b4b8-421ecf27b14a

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.