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CVE-2026-24898

Open-emr Openemr authentication bypass

10.0 CRITICALPublic exploitEPSS 0.56%
  1. Published3 Mar 2026

Description

OpenEMR is a free and open source electronic health records and medical practice management application. Prior to 8.0.0, an unauthenticated token disclosure vulnerability in the MedEx callback endpoint allows any unauthenticated visitor to obtain the practice's MedEx API tokens, leading to complete third-party service compromise, PHI exfiltration, unauthorized actions on the MedEx platform, and HIPAA violations. The vulnerability exists because the endpoint bypasses authentication ($ignoreAuth = true) and performs a MedEx login whenever $_POST['callback_key'] is provided, returning the full JSON response including sensitive API tokens. This vulnerability is fixed in 8.0.0.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

Open-emr Openemr< 8.0.0

Remediation

Fixed in
Open-emr Openemr≥ 8.0.0

References

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Frequently asked

Is CVE-2026-24898 being actively exploited?

CVE-2026-24898 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.56%.

How severe is CVE-2026-24898?

CVE-2026-24898 has a CVSS 3.1 base score of 10.0, rated critical. EPSS estimates a 0.56% probability of exploitation.

Which products are affected by CVE-2026-24898?

Affected products include Open-emr Openemr.

How do I fix CVE-2026-24898?

Upgrade affected software to a fixed version, for example Open-emr Openemr 8.0.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-24898 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.