CVE-2026-6473: use palloc_array() in hstore_plperl/hstore_plpython to avoid
integer overflow on 32-bit systems
CVE-2026-6474: guard pg_strftime() callers against unsafe conditions and
ensure null-terminated output to prevent format-string leak via crafted
timezone names
CVE-2026-6475: prevent path traversal in pg_rewind file operations by
validating paths received from a rogue server endpoint
CVE-2026-6477: add buf_size bounds-checking to pqFunctionCall3() and gate
PQfn() via a new PQnfn() helper to prevent client-side buffer overrun in
the large object interface (lo_export/lo_read/lo_lseek64/lo_tell64)
CVE-2026-6479: track processed SSL/GSS negotiation attempts in
ProcessStartupPacket() to prevent unbounded recursion causing backend
stack overflow
CVE-2026-6637: switch refint check_foreign_key() to StringInfo and quote
key values to prevent SQL injection and stack buffer overruns