Power of Attorney for Brent Pfeiffenberger

This filing contains a Power of Attorney document filed by Brent Pfeiffenberger, a director at Corbus Pharmaceuticals Holdings, Inc. The document, dated May 15, 2026, grants power of attorney to Yuval Cohen, Ph.D., Sean Moran, and Meghan Houghton. They are authorized to execute and file various securities disclosure documents, including Schedules 13D and 13G, Form ID, and Forms 3, 4, and 5, on behalf of Mr. Pfeiffenberger. This authorization is in accordance with Sections 13 and 16(a) of the Securities Exchange Act of 1934. The power of attorney remains in effect until Mr. Pfeiffenberger is no longer required to file these documents or until it is earlier revoked in writing. The filing also indicates that Mr. Pfeiffenberger is the reporting owner with CIK 0002001162 and that he owns no securities directly, as indicated by "noSecuritiesOwned: 1".