What’s Vulnerable › Vulnerabilities
CVE-2026-3432: Sim Studio AI - Unauthenticated OAuth Token Theft
- Severity: critical (CVSS 9.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-02 · updated 2026-06-17
- Weakness: CWE-862
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
- SimStudioAI sim: before 0.5.74 — fixed in 0.5.74
How to fix
Upgrade to a fixed version: SimStudioAI sim 0.5.74. Check the vendor advisory for mitigations.
References
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