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 arbitr…
Published: 2026-05-19 · CVSS: 7.1 · CVSS 4.0
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 privileges to configure a crawler-enabled page and trigger the crawl via a Scheduler task.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7