Deserialization of Untrusted Data in Site Crawler - CVE-2026-8727
Published: May 27, 2026
Vulnerability identifier: #VU132368
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-8727
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Kasper Skaarhoj, Daniel Poetzinger, Fabrizio Branca, Tolleiv Nietsch, Timo Schmidt, Michael Klapper, Stefan Rotsch, Tomas Norre Mikkelsen
Affected software:
Site Crawler
Site Crawler
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary code on the target system.
The vulnerability exists due to insecure input validation when processing serialized data within the X-T3Crawler-Meta response header. A remote administrator can pass specially crafted data to the application and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2026-8727
Install updates from vendor's website.