Piotr Mueller, however, provided few details.
"In the coming weeks, the whole of Poland, as a political class, regardless of political colours, we will be the subject of a disinformation attack," he told a press briefing on Wednesday.
"We will face wide-ranging disinformation activities that mix truthful information with information that is completely untrue," he continued.
He added that some newspaper editorial offices have already received specially prepared information about individual politicians that is "entirely manipulated, created and untrue."
Earlier on Wednesday, a meeting of the Government Crisis Management Team was held to discuss a number of recent cyber-attacks on Polish government officials, including the prime minister's chief of staff, Michal Dworczyk.
The government's information on the attacks was presented at a subsequent closed-door parliamentary session.
Following the sitting, Mueller said that "all the activities taken in recent weeks, in recent months, have been of an organised nature."
He added that the security services have taken action and identified some of the instigators of the disinformation activities but at this stage information on the issue is classified.
On June 8, Michal Dworczyk, the Polish prime minister's chief of staff, reported an attack on his and his wife's email and social media accounts. (PAP)