GHSA-f77v-9vpc-6pjm

Source

https://github.com/advisories/GHSA-f77v-9vpc-6pjm

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-f77v-9vpc-6pjm/GHSA-f77v-9vpc-6pjm.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-f77v-9vpc-6pjm

Aliases

CVE-2026-43940

Published

2026-05-08T18:34:20Z

Modified

2026-05-08T18:47:46.275952Z

Severity

9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

Electerm runWidget has a path traversal that leads to arbitrary code execution

Details

Impact

The runWidget function in src/app/widgets/load-widget.js constructs a file path by directly concatenating user‑supplied widget identifiers without any sanitisation:

const file = `widget-${widgetId}.js`
const widget = require(path.join(__dirname, file))

Because runWidget is exposed to the renderer process via an asynchronous IPC handler with no input validation, an attacker who achieves JavaScript execution inside the renderer (for example, through a malicious plugin or a cross‑site scripting flaw in the built‑in webview) can abuse a path traversal (../) to load and execute an arbitrary JavaScript file anywhere on the victim’s filesystem. This gives the attacker local code execution with the full privileges of the electerm process, leading to complete system compromise.

Patches

Fixed in version >= 3.7.16

Workarounds

Until a patch is released: - Do not install or run untrusted plugins. - Avoid loading arbitrary web content inside electerm’s embedded webview (for example, disable any features that fetch and display remote HTML). - Run electerm in a sandboxed environment (e.g., with bubblewrap on Linux, AppArmor/SELinux profiles, or Windows sandboxed app execution) to limit the impact of any code execution.

Resources

electerm GitHub Repository
electerm Security Policy
Vulnerability details originally reported by external researcher (PoC confirmed on v3.7.9, Win10).

Database specific

{
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-08T18:34:20Z",
    "cwe_ids": [
        "CWE-22",
        "CWE-829"
    ],
    "severity": "CRITICAL",
    "nvd_published_at": "2026-05-08T04:16:23Z"
}

References

Affected packages

npm / electerm

Package

Name: electerm; View open source insights on deps.dev
Purl: pkg:npm/electerm

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.7.16

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-f77v-9vpc-6pjm/GHSA-f77v-9vpc-6pjm.json"