Fixes ship in the latest published release. Earlier versions receive no backports, so reproduce on the latest release before reporting.
Report privately through GitHub Security Advisories. Without a GitHub account, write to mail@meisquietude.com.
Do not open a public issue for a vulnerability and do not attach a sample file that carries data you cannot share.
Useful in a report: the affected version and platform, what an attacker gains, and the smallest input or steps that reproduce it. Expect a first reply within a week. Once a fix ships, the advisory is published with credit to you unless you ask otherwise.
Viewda reads files that come from elsewhere, so malformed or hostile Parquet input is in scope: memory corruption in the reader, code execution through a file or a query, escapes from the sandboxed webview, tampering with the update channel or its signatures, and any traffic beyond the documented update check.
Out of scope: the operating system's code signing warnings for builds the README documents as unsigned.