Peiter Zatko will appear before the Senate Judiciary Committee next month pursuant to a subpoena

“Mr. Zatko’s allegations of widespread security failures and foreign state actor interference at Twitter raise serious concerns. If these claims are accurate, they may show dangerous data privacy and security risks for Twitter users around the world,” said Sens. Richard J. Durbin (D-Ill.) and Charles E. Grassley (R-Iowa), the chair and top Republican on the Senate Judiciary Committee.

The lawmakers said in a statement that in addition to the hearing, they would “take further steps as needed to get to the bottom of these alarming allegations.”

The hearing signals the mounting political and regulatory head winds for the social network in the wake of Zatko’s complaint, which has prompted bipartisan concerns about privacy and national security among lawmakers on Capitol Hill. The allegations became public as lawmakers have pledged to pass legislation to protect Americans’ data privacy and hold powerful social media companies accountable.

Twitter declined to comment on the hearing. The company has pushed back on Zatko’s allegations. Company spokeswoman Rebecca Hahn said that the company has long prioritized security and that Zatko’s disclosures appeared to be “riddled with inaccuracies.”

Twitter held a town hall Wednesday in which executives discussed the whistleblower complaint. Executives tried to make the case for how much the company had done for security and privacy, and described the complaint as a false narrative without going into details, said a person who attended the meeting, who spoke on the condition of anonymity to discuss an internal company event. Much of the employee Q&A was related to the company’s hiring freeze and attrition the company is facing in light of the market downturn and the chaos caused by the Musk takeover bid.

The Judiciary Committee announced the hearing a day after Zatko had three meetings on Capitol Hill, according to his lawyer, John Tye, the founder of Whistleblower Aid. Grassley’s and Durbin’s offices confirmed that Zatko met with Judiciary Committee staff but declined to say what was discussed in those meetings.

“We’re encouraged the U.S. Congress is taking this so seriously,” Tye said during a Twitter Spaces event hosted by The Post.

Sens. Richard Blumenthal (D-Conn.) and Edward J. Markey (D-Mass.) sent letters to federal regulators, including the Federal Trade Commission and Justice Department, calling on them to investigate Zatko’s allegations.

The FTC, Securities and Exchange Commission and Justice Department have received the complaint, and Tye says he has been in touch with agency investigators.