CVE-2026-8727

HIGH

Remote Code Execution in extension "Site Crawler" (crawler)

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v4 7.1
EPSS 0.0040
EPSS Percentile 60.9%
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

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-502
Status published
Products (2)
TYPO3/Extension "Site Crawler" < 11.0.13
TYPO3/Extension "Site Crawler" 12.0.0 - 12.0.11
Published May 19, 2026
Tracked Since May 19, 2026