Authentication Bypass in OpenEMR by OpenEMR Inc.
CVE-2026-67611

8.6HIGH

Key Information:

Vendor

Openemr

Status
Openemr
Vendor
CVE Published:
3 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-67611?

OpenEMR versions until 8.2.0 exhibit a vulnerability that allows attackers with valid user credentials to bypass multi-factor authentication. This is accomplished by exploiting an unauthenticated client registration endpoint as part of the OAuth2 password grant flow. By registering an OAuth2 client without authentication, attackers can leverage the password grant method to obtain an API access token, effectively circumventing the standard authentication interface and any multi-factor authentication measures that are supposed to be in place.

Affected Version(s)

openemr 0 <= 8.2.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-67611 - Proof of Concept

References

https://jivasecurity.com/writeups/openemr-preauth-disclos...
technical-descriptionexploit
https://www.vulncheck.com/advisories/openemr-oauth2-passw...
third-party-advisory

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jiva (JivaSecurity)
.