The head of the Queensland parliamentary committee that oversees the state's Crime and Misconduct Commission has demanded to know why confidential Fitzgerald Inquiry documents have been shredded.

The committee is investigating the accidental release of sensitive documents from the landmark inquiry into police corruption.

Committee chair Liz Cunningham has told Parliament that CMC chairman Ross Martin has revealed some material has been destroyed.

"These files ... contained intelligence information and were used by the then newly established Criminal Justice Commission to commence investigations into the information provided in those documents," she said.

"The committee has required the CMC to provide further information to the committee about what documents were destroyed and how and why this occurred."

Ms Cunningham says the CMC knew about the accidental release of Fitzgerald Inquiry documents last May, but didn't tell the committee until this week.

She says the corruption watchdog lacks governance and accountability.

"It is clear that the CMC did not act to ensure that the matter was appropriately addressed," she said.

"The committee will carefully consider its options in relation to the lack of governance within the CMC and the lack of accountability in not advising the committee at an earlier time in relation to these matters."