PYSEC-2026-450 pgadmin4 has a Meta-Command Filter Command Execution

The PLAIN restore meta-command filter introduced in pgAdmin as part of the fix for CVE-2025-12762 does not detect meta-commands when a SQL file begins with a UTF-8 Byte Order Mark EF BB BF or other special byte sequences. The implemented filter uses the function hasmetacommands, which scans raw...