CVE-2026-126454
OpenEMR before 8.5.0 TOTP Brute Force via main_screen.php and OAuth2
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
OpenEMR before 8.5.0 lacks rate limiting or lockout on TOTP submission, allowing attackers with a valid password to brute-force the 6-digit MFA code. Attackers can script repeated POST requests to main_screen.php or the OAuth2 authorization flow with re-submitted hidden credentials to bypass two-factor authentication.
| CWE | CWE-307 |
| Vendor | openemr |
| Product | openemr |
| Published | Nov 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
openemr / openemr
0 < 8.5.0
References
Credits
🔍 PhilipPhil 🔍 gracia-gu