CVE-2026-8727
Remote Code Execution in extension "Site Crawler" (crawler)
- State
- Published
- Severity
- 7.1 High
- Published
- May 19, 2026
- Updated
- May 19, 2026
- Reserved
- May 16, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L | TYPO3 |
Weaknesses
- CWE-502 Deserialization of Untrusted Data
Affected Products
| Product | Versions |
|---|---|
Extension "Site Crawler"TYPO3 |
|
References
- https://typo3.org/security/advisory/typo3-ext-sa-2026-008vendor-advisory
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