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Sim CVE-2026-3432

CRITICAL
Missing Authorization (CWE-862)
2026-03-02 vulnreport@tenable.com
Authentication Bypass Sim
9.1
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
9.1 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
CVE Published
Mar 02, 2026 - 13:16 nvd
CRITICAL 9.1

DescriptionCVE.org

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.

AnalysisAI

SimStudio has a second authorization flaw in the OAuth token endpoint that allows privilege escalation through crafted token requests.

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Send POST request to /api/auth/oauth/token
Exploit
Supply credentialAccountUserId and providerId parameters
Execution
Bypass authorization checks
Impact
Retrieve OAuth access token for target user
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Vulnerability AssessmentAI

Exploitation SimStudio version below 0.5.74 with /api/auth/oauth/token endpoint exposed. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 9.1 — combined with CVE-2026-3431 (MongoDB access), SimStudio has two critical access control failures. Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker crafts an OAuth token request that returns a token with admin privileges.
Remediation Update SimStudio. Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Identify all SimStudio instances and their versions; isolate or disable the /api/auth/oauth/token endpoint if possible; enable enhanced logging on authentication events. …

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CVE-2026-3432 vulnerability details – vuln.today
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