While looking at the logs, I noticed that this app is running Tor 0.4.7.8. It appears that was released over 2 years ago (https://gitlab.torproject.org/tpo/core/tor/-/blob/tor-0.4.7.8/ChangeLog?ref_type=tags) and the latest version is 0.4.8.13 (https://www.torproject.org/download/tor/). A quick search led me to 1 CVE that could have an impact (https://www.cve.org/CVERecord?id=CVE-2023-23589), but I'm not sure if it is relevant to the configuration that is used by Umbrel.