Security Advisory
CVE-2026-8727
CVE vulnerability detail — eXtreme Datacenter Security Operations
Description
The Crawler extension passes the X-T3Crawler-Meta response header from crawled URLs directly to PHPs unserialize(). An attacker controlling a crawled endpoint can inject arbitrary serialized PHP objects, leading to Remote Code Execution on the TYPO3 server. Exploitation requires administrative privileges to configure a crawler-enabled page and trigger the crawl via a Scheduler task.