IG discovers that Hegseth put Houthi mission in danger by using Signal.

A Pentagon inspector general report revealed that Defense Secretary Pete Hegseth transmitted sensitive operational details regarding an upcoming Yemen strike via his personal cell phone, potentially putting both the mission and personnel at risk.

The report, dated December 2 and released publicly on Thursday, noted that Hegseth had the authority to determine classification levels. He concluded that the details shared in a March 15 Signal conversation were either unclassified or could be safely declassified and summarized for the chat participants.

One participant, Atlantic editor Jeffrey Goldberg, apparently unaware of the sensitivity of the information, later published a report that exposed the breach.

Even though classified information may not have been directly disclosed, the IG emphasized the dangers of sharing nonpublic operational details so close to the timing of an airstrike. Hegseths messages included specifics about the number and timing of U.S. aircraft over hostile territory, sent 2 to 4 hours before the strikes, through an unsecure network.

The report stated, Using a personal cell phone to conduct official business and send nonpublic DoD information risks potential compromise of sensitive information, potentially endangering personnel and mission objectives.

The publication of the report reignited debates surrounding the so-called Signalgate incident, which emerged after Goldbergs initial coverage of the chats. Some lawmakers called for Hegseths resignation, describing the situation as a serious threat to service members.

House Armed Services Committee member Rep. Sarah Elfreth (D-Md.) criticized the actions, calling them a rookie mistake with potentially grave consequences, and demanded Hegseth step down immediately.

The Pentagon, however, highlighted that Hegseth had the authority to declassify the information he shared. His attorney, Timothy Parlatore, emphasized that no classified material was disclosed and that Hegseth acted within his authority to declassify and summarize the information.

The IG reported that Army Gen. Erik Kurilla, then-commander of U.S. Central Command, sent four emails on March 14 and 15 marked secret and not releasable to foreign nationals, outlining strike plans. The emails contained no markings differentiating classified elements, leading investigators to conclude all the information was classified.

On March 15, Hegseth, from a temporary sensitive compartmented information facility at his Fort McNair home, shared details of the planned strike in a group chat labeled Houthi PC Small Group. The chat included Vice President JD Vance, former national security adviser Mike Waltz, and Goldberg, who had been added by mistake. The messages included precise timings for two waves of F-18 strikes, as well as drone and Tomahawk missile plans.

The IG noted that the information Hegseth shared largely mirrored classified CENTCOM emails. Experts warned that if details about aircraft timings had reached Houthi forces, U.S. planes could have been targeted.

Hegseth provided a written statement in July, asserting that he determined the information did not require classification and summarized the strike details in an unclassified format.

The IG concluded that while Hegseth had the authority to classify or declassify information, his use of Signal on a personal phone did not align with Defense Department rules regarding personal devices and official communications. Such apps are only approved under emergency circumstances when official channels are unavailable or unreliable.

The report mentioned additional context provided by a DOD lawyer but did not include it, as supporting documentation was lacking.

Author’s Analysis: Operational Judgment and Communication Risks

In my assessment, the Pentagon inspector general’s report highlights a critical issue of operational discipline rather than a purely legal question about classification authority. The defense secretary may have possessed the authority to determine whether certain details could be declassified or summarized. However, the timing and method of communication—sending operational details through a personal phone on an unsecure messaging platform shortly before an airstrike—created unnecessary operational risk.

The report makes clear that the information shared closely mirrored classified communications from U.S. Central Command. Even if the transmitted version was technically unclassified, the operational context mattered. Details about aircraft numbers, strike timing, and sequencing can provide adversaries with actionable intelligence if intercepted. The inspector general’s warning reflects a standard principle of military planning: proximity to execution increases sensitivity, regardless of formal classification labels.

Another important factor is the communication environment. Department of Defense rules restrict the use of personal devices and commercial messaging apps for official business except under emergency circumstances. According to the report, those conditions were not clearly met. The presence of an unintended participant in the chat further illustrates the vulnerability of informal communication channels when handling operational matters.

Ultimately, the findings reinforce a broader institutional concern inside the Pentagon: operational security depends not only on classification authority but also on disciplined communication practices. The report does not conclude that classified material was directly leaked, yet it emphasizes that transmitting sensitive operational context through unsecured systems can still jeopardize missions and personnel.

Sources:

• IG finds Hegseth risked endangering Houthi mission with Signal use