Authenticated MFA bypass via OAuth2 password grant
Published Aug 3, 2026 · Updated Aug 3, 2026
Authentication bypass in OpenEMR 8.2.0 and earlier allows remote authenticated users to obtain API tokens without multi-factor authentication. The unauthenticated OAuth2 registration endpoint creates a client that can submit valid credentials to the password-grant token flow, which does not invoke MFA. Password grant must be enabled, and a valid OpenEMR account is required; successful exploitation grants API access under that account.
Summary
What happened
Authentication bypass in OpenEMR 8.2.0 and earlier allows remote authenticated users to obtain API tokens without multi-factor authentication. The unauthenticated OAuth2 registration endpoint creates a client that can submit valid credentials to the password-grant token flow, which does not invoke MFA. Password grant must be enabled, and a valid OpenEMR account is required; successful exploitation grants API access under that account.
The record
- CVE
- CVE-2026-67611
- Published
- Aug 3, 2026
- Updated
- Aug 3, 2026
- Vendor
- OpenEMR Foundation
- Product
- OpenEMR
- Classifications
- CWE-308, T1078
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 3, 2026CVE publishedPublication date reported by the CVE source.
- Aug 3, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=8.2.0
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- The Welcome Mat OpenEMR OAuth2 password-grant demonstrationproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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