DOM-based cross-site scripting in OHIF Viewers via document MIME type
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
OHIF Viewers from 3.5.0-beta.0 before 3.12.15, from 3.13.0-beta.0 before 3.13.7 and from 3.14.0-beta.0 before 3.14.0-beta.19 is affected. The dicom-pdf extension labels the embedded document with an attacker-controlled MIME type, so HTML runs with the OHIF origin (CWE-79). If a user opens a crafted DICOM PDF object, the script can read session storage, authentication tokens and same-origin PACS requests.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Description from the CNA
OHIF Viewers is a zero-footprint DICOM viewer with shared extension packages. From 3.5.0-beta.0 until 3.12.15, 3.13.7, and 3.14.0-beta.19, the dicom-pdf extension reads the attacker-controlled MIMETypeOfEncapsulatedDocument value in extensions/dicom-pdf/src/getSopClassHandlerModule.js and uses it as the Blob media type for the attacker-controlled EncapsulatedDocument bytes. When a victim opens Encapsulated PDF SOP Class 1.2.840.10008.5.1.4.1.1.104.1, extensions/dicom-pdf/src/viewports/OHIFCornerstonePdfViewport.tsx embeds the Blob URL in an object element. A Blob labeled as HTML is handled as HTML despite the application/pdf object hint, and the Blob inherits the OHIF origin, allowing embedded script to access session storage, authentication tokens, and same-origin PACS requests. The malicious DICOM object may be opened locally, uploaded to a shared PACS, or supplied by a DICOMweb source. This issue is fixed in source versions 3.12.15, 3.13.7, and 3.14.0-beta.19.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| OHIF | Viewers | 3.5.0-beta.0 to before 3.12.15; 3.13.0-beta.0 to before 3.13.7; 3.14.0-beta.0 to before 3.14.0-beta.19 | 3.12.15, 3.13.7, 3.14.0-beta.19 | Patch available | CNA |
- Viewers VendorOHIF Affected 3.5.0-beta.0 to before 3.12.15; 3.13.0-beta.0 to before 3.13.7; 3.14.0-beta.0 to before 3.14.0-beta.19 Fixed in 3.12.15, 3.13.7, 3.14.0-beta.19 Patch available CNA
Remediation
Upgrade OHIF Viewers to 3.12.15, 3.13.7 or 3.14.0-beta.19.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
- Fix · CNA Viewers (OHIF) Fixed in 3.12.15, 3.13.7, 3.14.0-beta.19
Timeline
- 2026-11-06 Threatist record created from CVE-2026-118670
- 2026-11-06 CISA SSVC decision points changed
- 2026-11-06 Priority changed: MEDIUM → LOW
References
Other 8
- https://github.com/OHIF/Viewers/security/advisories/GHSA-xwgp-w3pj-q5h3
- https://github.com/OHIF/Viewers/pull/6228
- https://github.com/OHIF/Viewers/commit/db546701bd5f2be9031c835f1de5c40aacd3dc62
- https://github.com/OHIF/Viewers/commit/ef0811c66cdb04ba07ffaba145cf66ce01486899
- https://github.com/OHIF/Viewers/commit/f0dba789a313f40fe7e8a8cbec322a8d8a491d76
- https://github.com/OHIF/Viewers/releases/tag/v3.12.15
- https://github.com/OHIF/Viewers/releases/tag/v3.13.7
- https://github.com/OHIF/Viewers/releases/tag/v3.14.0-beta.19
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences