OHIF Viewers DICOM

Summary

A critical Server-Side Request Forgery (SSRF) vulnerability, CVE-2026-12473, has been discovered in OHIF Viewers DICOM versions prior to 3.12.2. This flaw allows attackers to steal authenticated clinician tokens by crafting a malicious link, potentially impacting healthcare systems worldwide. A fix has been released, and users are urged to upgrade.

Full text

ICS Medical Advisory OHIF Viewers DICOM Release DateJune 25, 2026 Alert CodeICSMA-26-176-02 Related topics: Industrial Control System Vulnerabilities , Industrial Control Systems View CSAF Summary Successful exploitation of this vulnerability in a custom integration version could allow an attacker to steal an authenticated clinician's token via a crafted link. The following versions of OHIF Viewers DICOM are affected: OHIF DICOM Web Viewer Framework <=v3.12.0 CVSS Vendor Equipment Vulnerabilities v3 8.2 Open Health Imaging Foundation (OHIF) OHIF Viewers DICOM Server-Side Request Forgery (SSRF) Background Critical Infrastructure Sectors: Healthcare and Public Health Countries/Areas Deployed: Worldwide Company Headquarters Location: United States Vulnerabilities Expand All + CVE-2026-12473 Two data sources (DICOMWebProxy and DICOMJSON) shipped in the default configuration fetch an arbitrary URL parameter without validation. A global authentication service in OHIF automatically injects the authenticated user's OIDC Bearer token into the resulting requests, sending it to the attacker-controlled server. DICOMweb data sources are not impacted. View CVE Details Affected Products OHIF Viewers DICOM Vendor:Open Health Imaging Foundation (OHIF) Product Version:Open Health Imaging Foundation (OHIF) OHIF DICOM Web Viewer Framework: <=v3.12.0 Product Status:known_affected Remediations MitigationThe maintainer has fixed the reported vulnerability and released version 3.12.2 (2026-05-18). The fix is located at OHIF/Viewers#5985 (master), OHIF/Viewers#5978 (release/3.12). MitigationUsers are recommended to upgrade to v3.12.2 or later. Operators who need dicomwebproxy or dicomjson in authenticated deployments must additionally configure the new dangerouslyAllowedOriginsForAuthenticatedEnvironments allowlist in app-config.js. MitigationUsers running OHIF with authentication should remove ALL unused DicomWebProxyDataSource and DicomJSONDataSource configurations from the configuration file they are deploying with. Relevant CWE: CWE-918 Server-Side Request Forgery (SSRF) Metrics CVSS Version Base Score Base Severity Vector String 3.1 8.2 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N 4.0 8.3 HIGH CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N Acknowledgments Simon Weber and Volker Schönefeld of Machine Spirits UG reported this vulnerability to CISA Legal Notice and Terms of Use This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy). Recommended Practices CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet. Locate control system networks and remote devices behind firewalls and isolating them from business networks. When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies. CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies. Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents. CISA also recommends users take the following measures to protect themselves from social engineering attacks: Do not click web links or open attachments in unsolicited email messages. Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks. No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. Revision History Initial Release Date: 2026-06-25 Date Revision Summary 2026-06-25 1 Initial Publication Legal Notice and Terms of Use This product is provided subject to this Notification and this Privacy & Use policy. Tags Sector: Healthcare and Public Health Sector Topics: Industrial Control System Vulnerabilities, Industrial Control Systems Please share your thoughts We recently updated our anonymous product survey; we welcome your feedback. Related Advisories Jun 25, 2026 ICS Medical Advisory | ICSMA-26-176-01 pydicom pynetdicom Library Jun 18, 2026 ICS Medical Advisory | ICSMA-26-169-01 Apollo Pharmacy Blood Glucose Monitoring System APG-01 BT May 28, 2026 ICS Medical Advisory | ICSMA-26-148-01 Fourth Frontier Frontier X Mobile Application, Frontier X2 May 26, 2026 ICS Medical Advisory | ICSMA-26-146-01 Eppendorf BioFlo 320

Indicators of Compromise

• cve — CVE-2026-12473

Entities