Security audit 2026-10-17, finding I3 (low), stage 4. No compose file set
pids_limit: a fork bomb from a compromised panel or postfix had the host's
pid space as its limit. Now 1024 for SelfPost - the plan said 512, but
Postfix starts up to default_process_limit (100) processes per service,
and a busy server runs three smtpd services, cleanup and smtp at once -
256 for nginx, Caddy, Traefik and rspamd, 64 for certbot. The comment that
said root runs "very briefly" now says which root processes stay.
e2e: checkPidsLimit reads /sys/fs/cgroup/pids.max in the container.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
mixandClaude Opus 5.5
dd950364a3