PatchTheCVECVE-2026-3432: On SimStudio version below to 0.5.74, the `/api/auth/oauth/token` endpoint contains a code path that bypasses
CVE-2026-3432 is a critical-severity flaw (CVSS 9.1) affecting sim. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Critical severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.1 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 76%) |
| CISA exploited list | No |
| Weakness | CWE-862 |
| Published | 2026-03-02 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-3432?
sim: upgrade to 0.5.74. Exact commands for each OS are on this page.
Is CVE-2026-3432 being exploited?
CVE-2026-3432 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-3432 affect?
CVE-2026-3432 affects sim. Severity is critical (CVSS 9.1). 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
How urgent is CVE-2026-3432?
Priority 43/100. Critical severity; Remotely exploitable, no login, no user action
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