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Bearer tokens explained: the hidden risk behind your AI Agent strategy

Modern enterprises run on system-to-system communication powered by bearer tokens. While convenient, this design introduces a security risk, because anyone who obtains a token can use it.

Token theft has long been a risk, but recent breaches show how large the impact can be. In the Salesloft-Drift and Gainsight incidents, attackers used stolen bearer tokens to access the Salesforce environments of more than 700 organizations without triggering authentication alerts.

As AI agents and integrations rapidly expand across enterprise systems, this trust-based model dramatically increases the blast radius of a single compromise. Obsidian’s runtime defense introduces a new approach that moves security beyond blind trust in tokens toward verifiable, evidence-based access.

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