CVE-2026-3432

critical · 9.3

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.

9.3

CVSS

0.3%

EPSS (exploit prob.)

23rd

EPSS percentile

2026-03-02

Published

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE-862

Affected products

Vendor	Product	Affected versions
sim	sim	< 0.5.74

Check a specific version with /api/v1/cve/match.

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-3432