Beaker before 0.8.9 allows a sandbox escape, enabling system access and code execution. This occurs because Electron context isolation is not used, and therefore an attacker can conduct a prototype-pollution attack against the Electron internal messaging API.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12079
Reference (s):
- https://github.com/beakerbrowser/beaker/issues/1519
- https://github.com/beakerbrowser/beaker/releases/tag/0.8.9