CVE-2026-32286 pgx DataRow.Decode内存越界漏洞

package main import ( "fmt" "github.com/jackc/pgx/v5/pgproto3" ) func main() { // Simulate a malicious DataRow message with a negative field length // This PoC demonstrates the parsing logic that leads to panic backend := pgproto3.NewBackend([]byte{}, nil) // Construct a malicious DataRow message manually or trigger via network // Normally, the server sends: DataRow [len1, bytes1, len2, bytes2...] // Here we simulate receiving a message with a negative length in the stream // which causes the panic in vulnerable versions. fmt.Println("Attempting to parse malicious DataRow...") // Actual exploitation requires a malicious server connection. // This code represents the vulnerability context. // Example of the vulnerable function call context: // msg := &pgproto3.DataRow{} // msg.Decode(backend) // If backend stream contains negative length, panic occurs fmt.Println("PoC requires a malicious Postgres server connection.") }