CVE-2026-33376: fix auth proxy IPv6 allow-list entries without an explicit
mask being coerced to /32 instead of /128, which widened the allowed source
address range
CVE-2026-33377: fix privilege escalation where an Editor overwriting an
existing dashboard via the import API had default permissions re-applied,
granting them Admin on that dashboard; default permissions are now only set
for newly created dashboards