CVE-2026-3432 Sim Studio AI - Unauthenticated OAuth Token Theft
Unauthenticated attackers can steal OAuth tokens for any user via an authorization bypass in the token endpoint, leading to account takeover.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3432?
CVE-2026-3432 is a critical missing authorization vulnerability in SimStudioAI sim, published on 2 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-3432?
It affects 1 product.
Products include Sim Sim.
How do I fix CVE-2026-3432?
No fix has been published for CVE-2026-3432 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-3432 being exploited?
There is no known exploitation of CVE-2026-3432 in the wild and no public exploit code.
Other vulnerabilities in SimStudioAI sim
- CVE-2026-3431 Sim Studio AI - MongoDB SSRF and Arbitrary Document Deletion
- CVE-2025-15099 simstudioai sim CRON Secret internal.ts improper authentication
- CVE-2025-7107 SimStudioAI sim route.ts handleLocalFile path traversal
- CVE-2025-7114 SimStudioAI sim Session route.ts POST missing authentication
- CVE-2025-10096 SimStudioAI sim route.ts server-side request forgery
Sources
Also known as GHSA-vwxf-mg49-37v4.