Short-Lived AI Agent Tokens Can Limit Damage From Leaked Credentials

A September 2026 VentureBeat report found that exposed AI agent credentials were used to breach 395 organizations, highlighting how long-lived machine-to-machine tokens create serious security gaps. Unlike human passwords, AI agent credentials often remain valid for hours or days, meaning a leaked token stays exploitable long after it is compromised. A developer tested two agent configurations against identity provider Kinde — one using a static token valid for 24 hours and another that automatically rotates its token every 120 seconds before expiry. The rotating agent ensures that any stolen copy of its token becomes useless within minutes, dramatically shrinking the window of exposure. Both agents use the standard OAuth client-credentials flow, with Kinde's per-application token lifetime settings — not the grant type itself — determining how quickly each token expires.