This article examines misogyny and broader anti-gender ideology as under-recognized vectors of hybrid warfare that undermine NATO’s democratic resilience, military cohesion, and Alliance legitimacy. It argues that foreign adversaries exploit entrenched patriarchal and exclusionary narratives through gender-based disinformation to exacerbate polarization, target political actors, weaken trust in defence institutions, and delegitimize NATO. The article concludes that the principles of NATO’s Women, Peace and Security (WPS) policy counter foreign disinformation by limiting the impact of harmful gendered narratives and reinforcing pluralism, and what can be done to strengthen democratic resilience and NATO’s collective defence in an era of hybrid conflict.