CVE-2026-3432

CRITICAL
2026-03-02 [email protected]
9.1
CVSS 3.1
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CVSS Vector

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

Tags

Authentication Bypass Sim

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.

Analysis

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

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Remediation

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. Within 7 days: Contact vendor for patch availability and deployment timeline; implement network-based controls to restrict access to the vulnerable endpoint; conduct access logs review for suspicious OAuth token requests. …

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Priority Score

46
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +46
POC: 0

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CVE-2026-3432 vulnerability details – vuln.today
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