Deserialization of Untrusted Data in Block AJAX - CVE-2026-107249
Published: October 9, 2026
Vulnerability identifier: #VU154037
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-107249
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to the affected module does not sufficiently validate user-supplied data which is used to construct a block. A remote attacker 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.
Affected software
Block AJAX
How to mitigate CVE-2026-107249
Install updates from vendor's website.
Block AJAX - update to 3.0.2