Offline Hospital Management System CVE-2026-26462

Exploitation requires the Electron renderer to execute attacker-controlled JavaScript, which in practice means one of: (1) untrusted input rendered into the application UI without sanitization (stored or reflected XSS within hospital management fields), (2) the application loading remote content over an attacker-influenced channel (HTTP resources or compromised CDN), or (3) opening a malicious file/link that the application renders. The enabling configuration is specifically nodeIntegration:true combined with contextIsolation:false in the BrowserWindow webPreferences of version 5.3.0. Limiting factors: the victim must run the vulnerable desktop application locally, the attacker needs a delivery path into the renderer (the CVSS UI:N rating is optimistic - realistic delivery typically requires some user interaction or a network-side injection), and impact is bounded to the privileges of the OS user running the application.

The CVSS 7.3 reflects AV:N/AC:L/PR:N/UI:N with low CIA impact, but the vector is questionable for an offline desktop Electron app - true network exploitation requires the renderer to load attacker-controlled content (a malicious link, XSS-style injection into a rendered field, or a man-in-the-middle on any HTTP resource the app loads), which typically implies UI:R rather than UI:N. EPSS at 0.06% (18th percentile) and absence from CISA KEV indicate no observed mass exploitation. SSVC signals are not provided in the input. The realistic risk is moderate and targeted: any user-controllable string that ends up rendered as HTML/JS in the Electron window becomes a full RCE primitive, but the attack requires either a delivery vector into the app's UI or compromise of a network resource the app fetches. Conflict to note: CVSS AV:N/UI:N versus a description that implies the malicious JavaScript must first reach the renderer - verify the actual entry point with the vendor or the linked Medium write-up.

An attacker crafts a hospital record, patient note, or other free-text field whose contents are later rendered by the Electron renderer without escaping; the injected <script> payload calls require('child_process').exec() to drop a reverse shell or exfiltrate the local patient database. Alternatively, if the app loads any remote resource over HTTP, an on-path attacker injects script into that response. A public write-up describing the technique exists on Medium, but no weaponized exploit module is identified in the provided data.