GHSA-4f78-qhmw-8j8m is a medium-severity (CVSS 5.7) Code Injection vulnerability in electron. A fix is available for electron — see the affected versions and patch details below.
Electron: DevTools JavaScript Injection via Unsanitized Dock State Parameter
Exploitation Status
No confirmed exploitation observed yet
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for GHSA-4f78-qhmw-8j8m.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
GHSA-4f78-qhmw-8j8m plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,166 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
electronnpmDescription
Impact
The mode option of webContents.openDevTools() was not sanitized before use by the DevTools frontend. If an attacker can influence this value, script under their control may run in the DevTools context, which in unsandboxed configurations has access to Node.js.
Apps are only affected if untrusted input can reach the mode argument of openDevTools(), or if untrusted content can call openDevTools() on a <webview> it embeds. Apps that only ever pass a fixed dock mode are not affected.
Workarounds
Only pass fixed, allowlisted values (right, bottom, undocked, detach) as the DevTools mode, and do not expose openDevTools to untrusted content.
Fixed Versions
42.0.0-beta.141.2.040.9.039.8.7
For more information
If you have any questions or comments about this advisory, email Electron at [email protected]
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | electron | all versions | 39.8.7npm install electron@39.8.7 |
| 📦npm | electron | ≥ 40.0.0-alpha.1&&< 40.9.0 | 40.9.0npm install electron@40.9.0 |
| 📦npm | electron | ≥ 41.0.0-alpha.1&&< 41.2.0 | 41.2.0npm install electron@41.2.0 |
| 📦npm | electron | ≥ 42.0.0-alpha.1&&< 42.0.0-beta.1 | 42.0.0-beta.1npm install electron@42.0.0-beta.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for electron, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update electron to 39.8.7 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-4f78-qhmw-8j8m is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-4f78-qhmw-8j8m can be triaged on real exposure rather than presence alone.
Tailored to GHSA-4f78-qhmw-8j8m. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-4f78-qhmw-8j8m in your dependencies?
O3 Security finds GHSA-4f78-qhmw-8j8m across npm dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.