An antisemitic note was taped to the storefront of Upper East Side Assemblywoman Rebecca Seawright’s legislative office. The lurid message, which was not made available, made sexual references and alluded to Jewish stereotypes.

Seawright recently sponsored a “virtual town hall” event that focused on combating anti-Semitism and featured New York state Jewish leaders.

“We will never be intimidated by this criminal act. We have called for a hate crimes investigation,” Seawright said in a statement.

Assembly Speaker Carl Heastie (D-Bronx) also issued a statement slamming the hate-filled message at Seawright’s office at 1485 York Ave. “We must ensure the safety of the staff that work in this office and the constituents that utilize it for services,” Heastie said.

“We must call out hate in all its forms. These actions are completely unacceptable and un-American. The Assembly Majority condemns this disgraceful behavior and will continue to work to ensure New York remains inclusive and welcoming for all.”

Faith-based leaders from all religions planned to join forces outside Seawright’s office to condemn the antisemitic act.

It’s just the latest challenge for Seawright, a three-term incumbent who was knocked off the Democratic and Working Families Party lines over ballot paperwork snafus.

She has filed independent petitions to run on the independent “Rise and Unite” ballot line.

If she gains ballot status, Seawright would face off against Republican Louis Puliafito and possibly Democratic activist Patrick Bobilin, who is seeking to run under the independent “Blue Wave” banner.

The area is covered by surveillance cameras.