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CVE-2026-19418 Detail

Description

The referrer enforcement introduced with TYPO3-CORE-SA-2020-006 (CVE-2020-11069) became ineffective in TYPO3 v13.0, where TYPO3 CMS started serving the backend and Install Tool applications from the site's main entry script instead of the dedicated typo3/ directory. Whether a request originated from the backend or Install Tool itself was determined by comparing the referrer against the directory of the entry script, which since then is the site root. As a consequence, requests originating from any script running on one of the TYPO3 instance's own domains, such as a frontend page, were accepted by backend routes and Install Tool endpoints. Attackers able to execute JavaScript on one of those domains, for instance by exploiting a cross-site scripting vulnerability, could invoke these endpoints via Fetch/XHR with the privileges of an authenticated victim's user session. This issue affects TYPO3 CMS versions 13.0.0-13.4.33 and 14.0.0-14.3.5.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  TYPO3
CVSS-B 7.3 HIGH
Vector:  CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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URL Source(s) Tag(s)
TYPO3
TYPO3
TYPO3
TYPO3
TYPO3

Weakness Enumeration

CWE-ID CWE Name Source
CWE-346 Origin Validation Error TYPO3  
CWE-352 Cross-Site Request Forgery (CSRF) TYPO3  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-19418
NVD Published Date:
08/11/2026
NVD Last Modified:
08/11/2026
Source:
TYPO3