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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:
| CVSS | Vendor | Equipment | Vulnerabilities |
|---|---|---|---|
| v3 8.2 | Open Health Imaging Foundation (OHIF) | OHIF Viewers DICOM | Server-Side Request Forgery (SSRF) |
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.
Mitigation
The 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).
Mitigation
Users 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.
Mitigation
Users 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)
| 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 |
This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).
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.
| Date | Revision | Summary |
|---|---|---|
| 2026-06-25 | 1 | Initial Publication |
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