CVE-2026-8727 Remote Code Execution in extension "Site Crawler" (crawler)

The Crawler extension passes the X-T3Crawler-Meta response header from crawled URLs directly to PHP's 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...

CVE-2026-8727

The CVE-2026-8727 affects the TYPO3 Crawler extension (Site Crawler). The root cause is that the Crawler extension forwards the X-T3Crawler-Meta response header directly to PHP’s unserialize(), allowing an attacker-controlled crawled endpoint to inject arbitrary serialized PHP objects, leading to...