CVE-2022-46505: Matrixssl

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

An issue in MatrixSSL 4.5.1-open and earlier leads to failure to securely check the SessionID field, resulting in the misuse of an all-zero MasterSecret that can decrypt secret data.

Affected products

• Matrixssl Matrixssl: up to and including 4.5.1

Published 2023-01-18. Last modified 2026-06-17.