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CVE-2026-3432

Sim broken access control

9.1 CRITICALEPSS 0.47%
  1. Published2 Mar 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Sim< 0.5.74

Remediation

Fixed in
Sim≥ 0.5.74

References

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Frequently asked

Is CVE-2026-3432 being actively exploited?

CVE-2026-3432 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.47%.

How severe is CVE-2026-3432?

CVE-2026-3432 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.47% probability of exploitation.

Which products are affected by CVE-2026-3432?

Affected products include Sim.

How do I fix CVE-2026-3432?

Upgrade affected software to a fixed version, for example Sim 0.5.74 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-3432 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.