Read the docs
TI-2026-85646 Aliases CVE-2026-103019

Open redirect in OpenEMR OIDC end session endpoint

Priority LOW 20CWE-601Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-601.

Summary

OpenEMR before 8.3.0 is affected. The userSessionLogout() function processes an id_token_hint without verifying its signature and redirects to a caller-supplied post_logout_redirect_uri before checking it against the client's registered redirect URIs, which is an open redirect (CWE-601). An unauthenticated remote attacker can craft a logout link that sends a user to an arbitrary external site and ends the user's session, enabling convincing phishing from the legitimate logout endpoint. The endpoint is reachable when the OpenEMR REST API is enabled.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

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.

Why it matters now

EPSS 0.00263 18th percentileScored 2026-11-07
Fix Fixed openemr (openemr): 8.3.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
openemropenemrbefore 8.3.08.3.0Patch availableCNA
  • openemr Vendoropenemr Affected before 8.3.0 Fixed in 8.3.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:open-emr:openemr:*:*:*:*:*:*:*:*——Open-Emr
  • cpe:2.3:a:open-emr:openemr:*:*:*:*:*:*:*:* Versions — — ·Open-Emr

Remediation

Upgrade OpenEMR to version 8.3.0 or later, which fixes the issue.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

  • Fix · CNA openemr (openemr) Fixed in 8.3.0

Timeline

  1. 2026-11-05 Threatist record created from CVE-2026-103019

References

Other 4

  • TI-2026-24664 SQL Injection Vulnerability in ajax graphs library (OpenEMR) CVSS 3.1HIGH 8.8
  • TI-2026-85645 Missing write ACL lets users reassign documents in OpenEMR CVSS 3.1CRITICAL 9.6
  • TI-2026-28796 OpenEMR 8.2.0 Remote Code Execution via CategoryTree eval() Injection CVSS 4.0CRITICAL 9.4
  • TI-2026-20308 OpenEMR's payments gateway_api_key secret rendered into client JS code CVSS 3.1CRITICAL 9.6
  • TI-2026-20093 OpenEMR has SQL Injection in Patient API Sort Parameter CVSS 3.1CRITICAL 10.0
  • TI-2026-20048 OpenEMR Arbitrary File Read Vulnerability CVSS 3.1CRITICAL 10.0
See all 153 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences