high7.1
CVE-2026-8727
The Crawler extension passes the X-T3Crawler-Meta response header from crawled URLs directly to PHP's unserialize().
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | tomasnorre/crawler | >= 12.0.0, < 12.0.11 | 12.0.11 |