A House subcommittee will hold an open hearing next week on how frontier artificial intelligence models are shaping the cybersecurity landscape, for good and for ill.

The June 4 hearing will be the second the Homeland Security Subcommittee on Cybersecurity and Infrastructure Protection has held that was focused at least in part on the subject, following a similar hearing held in December. But unlike at that joint subcommittee hearing, where members also examined other emerging technologies, AI takes center stage next week.

It caps a series of closed-door meetings of the Homeland panel where members and staff have been evaluating the intersection of AI and cyber. CyberScoop is first to report details on the hearing.

The witnesses will be Sandra Joyce, vice president of Google Threat Intelligence; Chris Meserole, executive director of the Frontier Model Forum; Jack Cable, a former top official at the Cybersecurity and Infrastructure Security Agency and now chief executive officer and co-founder of Corridor Security; and Matthew Guariglia, senior policy analyst at the Electronic Frontier Foundation.

“Communist China is moving aggressively to control the technologies that will define the future of economic and military power, and few technologies are more consequential than artificial intelligence,” subcommittee chairman Andy Ogles, R-Tenn., said in a written statement. “Adversaries are already working to steal American AI capabilities, weaponize AI-enabled tools, infiltrate critical systems and undermine our national security.”

“AI is the America First mission of the future, and it is becoming our number one offensive and defensive weapon against cyber terrorists,” he continued. “I look forward to hearing from our witnesses on how we can stay ahead of AI-enabled cyber threats, protect the services Americans rely on and win this AI arms race.”

The hearing is the latest response from Capitol Hill to the spate of news about the capabilities of advanced AI models to uncover cyber vulnerabilities. Earlier this month, for instance, lawmakers wrote to National Cyber Director Sean Cairncross asking for a plan to deal with the potential surge in vulnerability discovery stemming from such models.

Last week, the Trump administration postponed a draft AI executive order. It’s something lawmakers are likely to ask about at next week’s hearing.

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The House Homeland Security Committee is digging into Anthropic’s AI model Mythos in a series of briefings and hearings, as questions proliferate on whether and how the federal government will make use of the technology touted for its ability to autonomously uncover cyber vulnerabilities.

Wednesday brought a closed-door briefing for the House Homeland Security Committee from Anthropic. The chairman of the panel’s cybersecurity subcommittee said he is planning to hold a hearing on the topic. And committee Democrats are requesting a classified briefing with Anthropic.

A committee aide who attended the briefing said it included a live demonstration of Mythos, “allowing members to see firsthand how advanced AI can identify and reason through software vulnerabilities. What we saw reinforced the urgency of ensuring that federal agencies, including our civilian cyber defenders, can responsibly access and deploy the most advanced U.S. models to find and patch vulnerabilities before foreign adversaries or criminal actors exploit them.”

A number of key lawmakers, including top committee Democrat Bennie Thompson of Mississippi and GOP cyber subcommittee chair Andy Ogles of Tennessee, told CyberScoop they weren’t able to attend Wednesday’s briefing. A second source who attended said it was a “productive” meeting.

“Members on both sides were focused on preserving U.S. advantage in AI, which basically came down to preserving our edge on compute power,” the source said. “They were also asking questions about whether the federal government was using Mythos, including about where CISA is and the impact of the supply chain risk designation.”

The Hill reported that Wednesday’s briefing was led on the Anthropic side by Logan Graham, from the company’s frontier red team, and Josh Tilstra, from the firm’s national security programs and policy team. It follows another recent closed briefing with Anthropic and OpenAI for the House Homeland Security Committee.

Ogles told CyberScoop he plans to hold a hearing of his subcommittee related to Mythos, but wasn’t able to attend Wednesday’s briefing due to scheduling conflicts. The top Democrat on Ogle’s subcommittee, Delia Ramirez of Illinois, also was unable to join due to prior commitments, but she was set to receive a rundown from staff about Wednesday’s briefing, her office said.

There’s a divide on which federal agencies are using Mythos thus far. For example: CISA reportedly isn’t, but the National Security Agency is. 

The federal divide on its use follows a Department of Defense blacklist that labeled the company a “supply chain risk” after Anthropic resisted pressure from the Pentagon to use its Claude AI model in ways the company opposed. The department says it has been using Mythos to identify cyber vulnerabilities despite the blacklist.

A turf battle is brewing within the Trump administration over testing of AI models, The Washington Post reported this week. Connecticut Rep. Jim Himes, the top Democrat on the House Intelligence Committee, said this week that it would be ‘insane” for U.S. spy agencies not to have early access to advanced AI models.

The Mythos briefing came one day after OpenAI announced its own cybersecurity initiative.

The committee aide said that “as the PRC aggressively works to close the AI innovation gap with the United States, the committee remains focused on ensuring that America’s AI leadership translates into a durable national security advantage, not a temporary lead that adversaries can copy, steal, or rapidly commoditize.”

Updated 5/13/26: to include comment from a committee aide who attended the briefing.

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The growth of data centers — and adversaries’ targeting of them — left lawmakers at a hearing Wednesday contemplating whether the federal government has the right setup for defending them.

Some industry witnesses and experts at the hearing of the House Homeland Security Subcommittee on Cybersecurity and Infrastructure Protection testified that the answer might be to give data centers their own standalone designation as a critical infrastructure sector.

The question of how to secure data centers against cyber and physical attacks coincides with artificial intelligence fuelling a boom in the building of such facilities across the United States. Last month, Iranian drones targeted two Amazon data centers in response to the U.S.-Israel bombing campaign on Iran, and a third data center in Bahrain was struck as well.

“If a major data center is attacked, disrupted, or taken offline, the consequences can reach far beyond one company or one sector,” Rep. Andy Ogles, R-Tenn., said in prepared opening remarks. “Yet our current framework does not provide a clear, unified approach to data center security. It does not clearly answer which federal agency is responsible for understanding the risk, coordinating with industry, or leading the response when this infrastructure is targeted.”

Three providers account for 63 percent of the market share of data centers: Amazon Web Services, Microsoft Azure and Google Cloud Platform. 

The United Kingdom already has deemed data centers as a standalone critical infrastructure sector. Reps. Vince Fong, R-Calif., and LaMonica McIver, D-N.J., asked panel witnesses Wednesday about federal protection of them.

“Given the scrutiny that is required to make sure that those data centers are secure, there would be a benefit in having them work together as a unique coordinating council,” said Robert Mayer, senior vice president for cybersecurity and innovation at USTelecom, an industry group.

The Foundation for Defense of Democracies’ Mark Montgomery suggested a sector that combines data centers and cloud providers, given the overlap in ownership. The 2024 rewrite of a White House national security memo left some experts disappointed that it didn’t designate cloud computing as a critical infrastructure sector. 

Samuel Visner, chair of the board of directors of the Space Information Sharing and Analysis Center, said he agreed, given the role data centers are playing in the U.S. economy, military and other dependencies. “Finding a way to regard them as part of our critical infrastructure and protect them accordingly is sine qua non, absolutely necessary,” he said.

A fourth witness didn’t weigh in on the need for a separate critical infrastructure designation. But Scott Algeier, executive director of Information Technology Information Sharing and Analysis Center, said his organization had created a “special interest group” for data center providers.

“The data centers are integrated already into the critical infrastructure discussions,” he told the panel.

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Illinois Rep. Delia Ramirez is taking over as the top Democrat on the House Homeland Security panel’s cybersecurity subcommittee, replacing former Rep. Eric Swalwell after his resignation.

Committee Democrats approved the change Tuesday at a meeting prior to a “shadow hearing” without the GOP majority, focused on protecting elections from Trump administration interference.

Ramirez first won election to Congress in 2022 and was reelected in 2024. She has served as the vice ranking member of the committee since 2023. She is now the ranking member of the Subcommittee on Cybersecurity and Infrastructure Protection.

She has leveled criticisms during committee hearings about the Trump administration’s personnel cutbacks at the Cybersecurity and Infrastructure Security Agency, and was critical of how data was secured under the administration’s Department of Government Efficiency initiative led by Elon Musk.

“Under a Musk and Trump presidency, it’s clear that the security of Americans’ information is not a priority. I mean, a private civilian with no security clearance bullied his way into the Treasury, set up private servers, and stole sensitive information from an agency. If that isn’t a national security crisis, a cybersecurity  crisis –then I don’t know what is,” Ramirez said at an early 2025 hearing. “The true threat to our homeland security is ‘fElon’ Musk, Trump, and their blatant misuse of power to steal information and coerce employees to leave agencies.”

She cosponsored legislation last year meant to strengthen the cybersecurity workforce by promoting measures to help workers from underrepresented and disadvantaged communities to join the field.

But she also had criticisms of U.S. cybersecurity under the Biden administration, including of Microsoft’s role in the SolarWinds breach.

In a statement about her appointment Tuesday, Ramirez took aim at at Trump, Vice President JD Vance, Department of Homeland Security Secretary Markwayne Mullin and White House homeland security adviser Stephen Miller.

“It’s clear that the security of our communities’ information, federal networks, and critical infrastructure have not been priorities” under them, she said. “Between the security failures of DOGE, the abuses of immigrant families’ data, and the decimation of CISA’s workforce and resources, Republicans have demonstrated a lack of interest in safeguarding our nation’s cybersecurity and our residents’ civil rights and privacy. In neglecting necessary oversight, Republicans have deregulated emerging technologies, allowed bad actors to profit from violations of our civil rights, and consented to the weaponization of government systems. It is more critical than ever that we assert our Congressional authority and disrupt the blatant corruption making us all less safe.”

Swalwell left the position following his resignation from Congress as a representative from California amid allegations of sexual misconduct.

Her ascension completes a full leadership turnover for the subcommittee. Rep. Andy Ogles, R-Tenn., took over the gavel late last year after former chairman Andrew Garbarino, R-N.Y., took over as chairman of the full committee.

The subcommittee is set to hold a hearing Wednesday on CISA and its role as the sector risk management agency for a number of critical infrastructure sectors.

Updated 4/28/26: to include comment from Ramirez.

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