High severityNVD Advisory· Published May 19, 2026· Updated Jun 17, 2026
CVE-2026-8727
CVE-2026-8727
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
tomasnorre/crawlerPackagist | >= 12.0.0, < 12.0.11 | 12.0.11 |
tomasnorre/crawlerPackagist | < 11.0.13 | 11.0.13 |
Affected products
2Patches
Vulnerability mechanics
References
4News mentions
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