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Critical · 9.3 CVE-2026-3432 EUVD-2026-9173GHSA-vwxf-mg49-37v4

Sim Studio AI - Unauthenticated OAuth Token Theft

Published Mar 2, 2026 · Updated Mar 2, 2026 · Assigned by tenable

Description

On SimStudio version below to 0.5.74, the `/api/auth/oauth/token` endpoint contains a code path that bypasses all authorization checks when provided with `credentialAccountUserId` and `providerId` parameters. An unauthenticated attacker can retrieve OAuth access tokens for any user by supplying their user ID and a provider name, effectively stealing credentials to third-party services.

Affected products

VendorProductAffectedFixed
SimStudioAI sim < 0.5.74 0.5.74

References