Is CVE-2026-124481 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-124481 being exploited in the wild.

How severe is CVE-2026-124481?

Medium severity, with a CVSS score of 6.5, published 8 November 2026.

Is there a fix for CVE-2026-124481?

Yes: fixed in 8.4.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-124481 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-124481?

Check whether you run OpenEMR at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-124481: OpenEMR improper authorization in Rainforest patient portal payments

CVE-2026-124481 · Severity: medium · CVSS 6.5 · Published 2026-11-08

OpenEMR is an electronic health records system used by healthcare providers to manage patient data and billing. An authenticated patient using the portal's payment feature can manipulate payment transactions to create fraudulent billing credits for other patients' accounts at arbitrary amounts, falsifying receivables even when paying only $1. This allows a patient to damage other patients' billing records and interfere with healthcare operations.

Technologies: OpenEMR. Vendors: OpenEMR.

Quick answers

Is CVE-2026-124481 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-124481 being exploited in the wild.
How severe is CVE-2026-124481?: Medium severity, with a CVSS score of 6.5, published 8 November 2026.
Which products and versions are affected?: OpenEMR before 8.4.0.
Is there a fix for CVE-2026-124481?: Yes: fixed in 8.4.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-124481 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-124481?: Check whether you run OpenEMR at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 8.4.0

Technical details

The vulnerability is an improper authorization flaw (CWE-639) in the Rainforest payment integration where the server trusts attacker-controlled JSON fields (patientId, encounter ID, amount) sent from the browser instead of deriving them from the authenticated session. An authenticated portal patient can send forged JSON to portal_payment.rainforest.php with another patient's ID and encounter data; when the payin.authorized webhook is processed, the metadata amount is written to ar_activity.pay_amount instead of the actual authorized payment amount, allowing cross-patient billing fraud.

Affected products

OpenEMR OpenEMR before 8.4.0

Timeline

2026-09-13: disclosed
2026-11-08: advisory

References

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