---
id: CVE-2026-103019
title: 'OpenEMR: Unauthenticated Open Redirect via OIDC End Session Endpoint'
summary: >-
  OpenEMR is a free and open source electronic health records and medical
  practice management application. Prior to 8.3.0, userSessionLogout() in
  src/RestControllers/AuthorizationController.php uses decodeToken() to process
  an id_token_hin…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-601
vendor: openemr
product: openemr
affected:
  - openemr < 8.3.0
published: '2026-11-05'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T20:04:25.657Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-103019'
references:
  - url: 'https://github.com/openemr/openemr/security/advisories/GHSA-5h9g-m7q2-pv45'
    label: 'https://github.com/openemr/openemr/security/advisories/GHSA-5h9g-m7q2-pv45'
  - url: 'https://github.com/openemr/openemr/pull/13133'
    label: 'https://github.com/openemr/openemr/pull/13133'
  - url: >-
      https://github.com/openemr/openemr/commit/50f789fad45ada625fe8d0faf0c7a9c15ef52aa5
    label: >-
      https://github.com/openemr/openemr/commit/50f789fad45ada625fe8d0faf0c7a9c15ef52aa5
  - url: 'https://github.com/openemr/openemr/releases/tag/v8_3_0'
    label: 'https://github.com/openemr/openemr/releases/tag/v8_3_0'
tags:
  - cve.org
ingestedAt: '2026-11-05T22:38:31.693Z'
---

## Overview

OpenEMR is a free and open source electronic health records and medical practice management application. Prior to 8.3.0, userSessionLogout() in src/RestControllers/AuthorizationController.php uses decodeToken() to process an id_token_hint without verifying its signature and, when the referenced trusted session is absent, redirects to the caller-supplied post_logout_redirect_uri before validating it against the client's registered redirect URIs. An unauthenticated attacker can craft a logout link that sends a user to an arbitrary external site and invalidates the user's session, enabling convincing phishing flows from the legitimate logout endpoint. The endpoint is reachable when the OpenEMR REST API is enabled. This issue is fixed in version 8.3.0.

## Affected

- `openemr < 8.3.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.