Missing Authorization Flaw in OpenEMR Portal Document APIs
CVE-2026-124484

8.7HIGH

Key Information:

Vendor

Openemr

Status
Openemr
Vendor
CVE Published:
8 November 2026

What is CVE-2026-124484?

OpenEMR prior to version 8.4.0 has a vulnerability in its portal onsite-document APIs, which allows any authenticated core user to access and manipulate documents belonging to other patients. This occurs due to a failure to enforce proper authorization checks. By omitting the patientId parameter and supplying arbitrary record IDs, users may list, read, and overwrite sensitive documents, signatures, and template data of other patients. This flaw poses significant risks to patient confidentiality and data integrity.

Affected Version(s)

openemr 0 < 8.4.0

openemr 8.4.0

References

https://github.com/openemr/openemr/security/advisories/GH...
vendor-advisory
https://www.vulncheck.com/advisories/openemr-before-8.4.0...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

christos-cantina-security
L0stHeart
.