Deserialization of Untrusted Data in Matrix Authorization Strategy - CVE-2026-42521
Published: May 4, 2026
Vulnerability identifier: #VU129239
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-42521
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to insecure input validation when processing serialized data. A remote user can instantiate arbitrary types on the system.
Affected software
Matrix Authorization Strategy
How to mitigate CVE-2026-42521
Install updates from vendor's website.
Matrix Authorization Strategy - update to 3.2.10