CVE-2026-3432

9.3 criticalEPSS 0.3%

Critical (9.3) in sim sim. EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

9.3 critical

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

9.1 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 27% of CVEs (scores of 2026-10-31)
CWE: CWE-862
Published: 2026-03-02
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

sim:sim

References

https://www.tenable.com/security/research/tra-2026-13

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