Defense-in-depth for the dashboard plugin auto-import path. The web server
auto-imports and mounts the Python backend (dashboard/manifest.json -> api file)
of plugins found in ~/.hermes/plugins/ (user) and ./.hermes/plugins/ (project),
not just bundled plugins. So any plugin that reaches one of those dirs gets
arbitrary Python executed on the next dashboard start.
NOTE ON THREAT MODEL: #43719's originally-documented delivery chain (a public
--insecure dashboard + open API used to git clone a malicious repo into
~/.hermes/plugins/) is ALREADY mitigated on main — since the June 2026
hermes-0day hardening, a non-loopback bind ALWAYS requires an auth provider and
--insecure no longer bypasses the auth gate. This change is therefore NOT
closing that (now-authenticated) network path; it removes the residual
'arbitrary code executes merely because a plugin is on disk' hazard, which still
applies when a plugin arrives by other means: a socially-engineered git clone,
a supply-chain drop, an authenticated-but-malicious actor, or a future
regression in the auth gate. Untrusted on-disk code should not auto-execute.
Restrict dashboard backend Python auto-import to BUNDLED plugins only. User and
project plugins may still extend the dashboard UI via static JS/CSS, but their
api Python file is never auto-imported. Two layers: _discover_dashboard_plugins
scrubs api/_api_file for user/project sources (and bundled wins name conflicts
so a non-bundled plugin cannot shadow a trusted backend route);
_mount_plugin_api_routes re-refuses user/project at mount time. Tightens the
prior GHSA-5qr3-c538-wm9j / #29156 hardening (bundled+user) to bundled-only.
Salvaged from #44472 (@egilewski) onto current main.
8845f3316c