Current study examines whether Corporate Social Responsibility (CSR) initiatives can genuinely address the environmental and social injustices within the global fashion supply chain, using an environmental justice framework. We analyzed CSR policies of leading fashion brands to identify areas of environmental injustice and evaluate the overall justice these policies embody. Our research highlights that the voluntary compliance mechanisms often fail to protect workers and the environment in low- and middle-income countries. Despite CSR efforts, the fast fashion model perpetuates exploitation and environmental degradation, evidenced by events such as the Rana Plaza collapse and extensive pollution in production regions. The vibrant marketing strategies of fashion brands mask the external costs of production, challenging the effectiveness of CSR. Therefore, the fast fashion industry’s current approach to CSR is insufficient in addressing the deep-seated issues of environmental justice. Only by recognizing and rectifying these externalities and exploitations can meaningful progress be made towards a more sustainable and equitable fashion industry. This research calls for a re-evaluation of CSR practices and urges stakeholders to consider the broader implications of their actions on both the environment and vulnerable communities worldwide. The study underscores the need for more robust, legally binding regulations and international oversight to ensure credible and effective CSR practices. Our findings provide critical insights for policymakers, industry stakeholders, and researchers, advocating for a shift towards more equitable and sustainable practices in the fashion industry.