CVE-2026-17566 pgAdmin 4: RCE via backslash-escape mismatch in Import/Export Data query guard (incomplete defense, sibling gap to CVE-2025-13780)

pgAdmin 4's Import/Export Data tool builds a psql \copy ... command line by interpolating a user-supplied SQL query into a Jinja template and passing the rendered line to psql via --command. To stop an attacker from breaking out of the ... wrapper, createimportexportjob route POST...