CVE-2026-8727
NoneCVSS
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EPSS
0.5%
Published
May 19, 2026
CISA due date
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The record
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 | Introduced | Fixed |
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