CVE-2026-8727
HIGH EPSS 30.8%
Published May 19, 20261mo ago · Modified Jun 17, 20261w ago
7.1 CVSS 4.0
Published May 19, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Network
Attack Complexity High
Privileges Required High
User Interaction A
Scope X
Threat Intelligence
EPSS Exploit Probability
30.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-502 Deserialization of Untrusted Data Validation
References 1
- typo3.org https://typo3.org/security/advisory/typo3-ext-sa-2026-008
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.