US cyber defense chief accidentally uploaded secret government info to ChatGPT
Cybersecurity “nightmare”
Congress recently grilled the acting chief on mass layoffs and a failed polygraph.
Alarming critics, the acting director of the Cybersecurity and Infrastructure Security Agency (CISA), Madhu Gottumukkala, accidentally uploaded sensitive information to a public version of ChatGPT last summer, Politico reported.
According to “four Department of Homeland Security officials with knowledge of the incident,” Gottumukkala’s uploads of sensitive CISA contracting documents triggered multiple internal cybersecurity warnings designed to “stop the theft or unintentional disclosure of government material from federal networks.”
Gottumukkala’s uploads happened soon after he joined the agency and sought special permission to use OpenAI’s popular chatbot, which most DHS staffers are blocked from accessing, DHS confirmed to Ars. Instead, DHS staffers use approved AI-powered tools, like the agency’s DHSChat, which “are configured to prevent queries or documents input into them from leaving federal networks,” Politico reported.
It remains unclear why Gottumukkala needed to use ChatGPT. One official told Politico that, to staffers, it seemed like Gottumukkala “forced CISA’s hand into making them give him ChatGPT, and then he abused it.”
The information Gottumukkala reportedly leaked was not confidential but marked “for official use only.” That designation, a DHS document explained, is “used within DHS to identify unclassified information of a sensitive nature” that, if shared without authorization, “could adversely impact a person’s privacy or welfare” or impede how federal and other programs “essential to the national interest” operate.
There’s now a concern that the sensitive information could be used to answer prompts from any of ChatGPT’s 700 million active users.
OpenAI did not respond to Ars’ request to comment, but Cyber News reported that experts have warned “that using public AI tools poses real risks because uploaded data can be retained, breached, or used to inform responses to other users.”
Sources told Politico that DHS investigated the incident for potentially harming government security—which could result in administrative or disciplinary actions, DHS officials told Politico. Possible consequences could range from a formal warning or mandatory retraining to “suspension or revocation of a security clearance,” officials said.
However, CISA’s director of public affairs, Marci McCarthy, declined Ars’ request to confirm if that probe, launched in August, has concluded or remains ongoing. Instead, she seemed to emphasize that Gottumukkala’s access to ChatGPT was only temporary, while suggesting that the ChatGPT use aligned with Donald Trump’s order to deploy AI across government.
“Acting Director Dr. Madhu Gottumukkala was granted permission to use ChatGPT with DHS controls in place,” McCarthy said. “This use was short-term and limited. CISA is unwavering in its commitment to harnessing AI and other cutting-edge technologies to drive government modernization and deliver” on Trump’s order.
Scrutiny of cyber defense chief remains
Gottumukkala has not had a smooth run as acting director of the top US cyber defense agency after Trump’s pick to helm the agency, Sean Plankey, was blocked by Sen. Rick Scott (R-Fla.) “over a Coast Guard shipbuilding contract,” Politico noted.
DHS Secretary Kristi Noem chose Gottumukkala to fill in after he previously served as her chief information officer, overseeing statewide cybersecurity initiatives in South Dakota. CISA celebrated his appointment with a press release boasting that he had more than 24 years of experience in information technology and a “deep understanding of both the complexities and practical realities of infrastructure security.”
However, critics “on both sides of the aisle” have questioned whether Gottumukkala knows what he’s doing at CISA, Cyberscoop reported. That includes staffers who stayed on and staffers who prematurely left the agency due to uncertainty over its future, Politico reported.
At least 65 staffers have been curiously reassigned to other parts of DHS, Cyberscoop reported, inciting Democrats’ fears that CISA staffers are possibly being pushed over to Immigration and Customs Enforcement (ICE).
The same fate almost befell Robert Costello, CISA’s chief information officer, who was reportedly involved with meetings last August probing Gottumukkala’s improper ChatGPT use and “the proper handling of for official use only material,” Politico reported.
Earlier this month, staffers alleged that Gottumukkala took steps to remove Costello from his CIO position, which he has held for the past four years. But that plan was blocked after “other political appointees at the department objected,” Politico reported. Until others intervened to permanently thwart the reassignment, Costello was supposedly given “roughly one week” to decide if he would take another position within DHS or resign, sources told Politico.
Gottumukkala has denied that he sought to reassign Costello over a personal spat that Politico’s sources said sprang from “friction because Costello frequently pushed back against Gottumukkala on policy matters.” He insisted that “senior personnel decisions are made at the highest levels at the Department of Homeland Security’s Headquarters and are not made in a vacuum, independently by one individual, or on a whim.”
The reported move looked particularly shady, though, because Costello “is seen as one of the agency’s top remaining technical talents,” Politico reported.
Congress questioned ongoing cybersecurity threats
This month, Congress grilled Gottumukkala about mass layoffs last year that shrank CISA from about 3,400 staffers to 2,400. The steep cuts seemed to threaten national security and election integrity, lawmakers warned, and potentially have left the agency unprepared for any potential conflicts with China.
At a hearing held by the House Homeland Security Committee, Gottumukkala said that CISA was “getting back on mission” and plans to reverse much of the damage done last year to the agency.
However, some of his responses did not inspire confidence, including a failure to forecast “how many cyber intrusions CISA expects from foreign adversaries as part of the 2026 midterm elections,” the Federal News Network reported. In particular, Rep. Tony Gonzales (R-Texas) criticized Gottumukkala for not having “a specific number in mind.”
“Well, we should have that number,” Gonzales said. “It should first start by how many intrusions that we had last midterm and the midterm before that. I don’t want to wait. I don’t want us waiting until after the fact to be able to go, ‘Yeah, we got it wrong, and it turns out our adversaries influenced our election to that point.’”
Perhaps notably, Gottumukkala also dodged questions about reports that he failed a polygraph when attempting to seek access to other “highly sensitive cyber intelligence,” Politico reported.
The acting director apparently blamed six career CISA staffers for requesting that he agree to the polygraph test, which the staffers said was typical protocol but Gottumukkala later claimed was misleading.
Failing the test isn’t necessarily damning, since anxiety or technical errors could trigger a negative result. However, Gottumukkala appears touchy about the test that he now regrets sitting for, calling the test “unsanctioned” and refusing to discuss the results.
It seems that Gottumukkala felt misled after learning that he could have requested a waiver to skip the polygraph. In a letter suspending those staffers’ security clearances, CISA accused staff of showing “deliberate or negligent failure to follow policies that protect government information.” However, staffers may not have known that he had that option, which is considered a “highly unusual loophole that may not have been readily apparent to career staff,” Politico noted.
Staffers told Politico that Gottumukkala’s tenure has been a “nightmare”—potentially ruining the careers of longtime CISA staffers. It troubles some that it seems that Gottumukkala will remain in his post “for the foreseeable future,” while seeming to politicize the agency and bungle protocols for accessing sensitive information.
According to Nextgov, Gottumukkala plans to right the ship with “a hiring spree in 2026 because its recent reductions have hampered some of the Trump administration’s national security goals.”
In November, the trade publication Cybersecurity Dive reported that Gottumukkala sent a memo confirming the hiring spree was coming that month, while warning that CISA remains “hampered by an approximately 40 percent vacancy rate across key mission areas.” All those cuts were “spurred by the administration’s animus toward CISA over its election security work,” Cybersecurity Dive noted.
“CISA must immediately accelerate recruitment, workforce development, and retention initiatives to ensure mission readiness and operational continuity,” Gottumukkala told staffers at that time, then later went on to reassure Congress this month that the agency has “the required staff” to protect election integrity and national security, Cyberscoop reported.
Ashley is a senior policy reporter for Ars Technica, dedicated to tracking social impacts of emerging policies and new technologies. She is a Chicago-based journalist with 20 years of experience.
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