Content Security Policy Drift in Salesforce Lightning: Engineering Stable Embedded Integration Boundaries

A global case management system depends on a telephony surface to bind a live call to a customer record. When a call arrives, an external CTI frame loads inside Lightning, identifies the caller, resolves the account, and anchors the interaction to an open case. That binding is logged, audited, and later referenced by downstream analytics and compliance reviews. The desk assumes that if the page renders and the integration was validated during implementation, the identity chain will hold for the life of the system.

That assumption rests on a boundary contract most teams never model explicitly.

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