BOSTON—A Boston Police officer was rushed to the hospital Thursday morning after being jabbed by a hypodermic needle while responding to yet another chaotic gathering in Mayor Michelle Wu’s open-air drug zone at Mass and Cass.

The nightmare unfolded just after 10 a.m. at Massachusetts Avenue and Melnea Cass Boulevard — where addicts slump on sidewalks, junkies shoot up in broad daylight, and the city’s drug crisis festers unchecked.

Police say a woman was caught on camera stuffing drug paraphernalia into her jacket. But when officers moved in, one was pricked in the finger by a syringe hidden in her pocket — a horrifying reminder of the risks cops face in what has become Boston’s most lawless corridor.

The wounded officer was immediately transported to the hospital for emergency treatment. His condition remains unknown.

The woman was summonsed to court on possession charges — another slap-on-the-wrist moment in a neighborhood residents say has become a crime-ridden wasteland under Wu’s soft-on-crime leadership.

For families and business owners in the South End, it’s more proof that Mass and Cass is spiraling further out of control — a city-sanctioned danger zone where the needles pile up, the addicts collapse on stoops, and the police themselves aren’t safe.