CVE-2026-118670
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in, but needs a user to act. High risk of data exposure.
- Exploit odds
- 0.4% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- ReservedThe CVE id was reserved by its CNA
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.4% in the next 30 days (EPSS).
- Severity: 8.8 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.4% · EPSS, next 30 days
- Weakness
- CWE-79 · Cross-site scripting
- Record status
- Received
Attack profile CVSS 3.1 · 8.8
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- High
- Integrity
- Low
- Availability
- Low
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:L
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-118670.md and follow it. Check whether this project is affected by CVE-2026-118670. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- 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/pull/6228
- 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
- https://github.com/OHIF/Viewers/security/advisories/GHSA-xwgp-w3pj-q5h3
References
- 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/pull/6228
- 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
- https://github.com/OHIF/Viewers/security/advisories/GHSA-xwgp-w3pj-q5h3