Salesforce Gainsight Token Abuse Enables Unauthorized Data Access

A new Salesforce-connected app compromise involving Gainsight-published applications has triggered a significant supply-chain security concern across enterprises relying on Salesforce integrations. In its initial disclosure, Salesforce stated that unusual activity linked to Gainsight apps may have enabled unauthorized access to customer CRM data via stolen or misused OAuth access tokens. This mirrors the previously reported Salesloft/Drift token compromise and aligns with MITRE ATT&CK techniques such as T1098 (Account Manipulation), T1528 (Steal Application Access Tokens), and T1195 (Supply Chain Compromise). Gainsight applications, widely used for customer success workflows, rely heavily on long-lived connectors, making token theft a high-impact vector. The attack mechanism centers around OAuth token revocation and the misuse of third-party connectors rather than a direct vulnerability in the Salesforce platform itself. Once Salesforce detected anomalous access patterns, it revoked all access and refresh tokens globally for Gainsight applications and removed the apps from the AppExchange pending investigation. Gainsight confirmed disruptions on its own status page following Salesforce’s decisive cuts to application access. According to the disclosure, affected users likely experienced disconnected integrations, broken workflows, and possible unauthorized access to CRM data fields depending on the privileges of the compromised connectors. Business impact varies by organization but can be severe, particularly for enterprises that store customer PII, revenue intelligence, health data, or regulated content in Salesforce records. Unauthorized token-based access allows attackers to extract data, modify customer profiles, or pivot into integrated downstream systems connected through SSO. Compliance concerns arise under GDPR, HIPAA, and ISO 27001, especially where organizations rely on third-party apps for automated data synchronization. This marks the second major token-based supply-chain threat to Salesforce customers within months, suggesting systemic weaknesses in third-party app governance. Mitigation actions include reviewing OAuth token logs, disabling unnecessary integrations, enforcing least-privilege scopes for connected apps, implementing conditional access controls, and enabling session anomaly detection. Enterprises should audit all integrations using Gainsight, Salesloft, Drift, and similar connectors, and implement app-to-app zero-trust policies. Salesforce customers are advised to monitor for ongoing updates as the investigation proceeds and reauthorize applications only after verification of security posture.