CVE-2026-8727
HIGH
MEDIUM
Priority: 0.03
BB Relevance:
39/100
Published: 2026-05-19
Modified: 2026-10-26
First seen: 2026-10-29
Status: active
Attack Surface
Network
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
High
PR:
High
UI:
Active
S:
X
AT:
Present
VC:
High
VI:
High
VA:
High
Description
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.