CVE-2026-43942 — electerm
MEDIUMCVE-2026-43942 is a medium-severity (CVSS 5.5) Information Exposure vulnerability in electerm. No vendor fix is recorded yet; mitigation options are listed below.
electerm: Full process.env exposed to renderer via window.pre.env in electerm
Exploitation Status
No confirmed exploitation observed yet
- 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 CVE-2026-43942.
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
CVE-2026-43942 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 377,636 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.
electermnpmDescription
Impact
The getConstants() IPC handler in src/app/lib/ipc-sync.js serialises the entire process.env object and sends it to the renderer. The data is stored as window.pre.env and is accessible from any JavaScript running in the renderer (e.g., via the DevTools console or a compromised webview context).
On developer and CI machines, process.env routinely contains secrets such as:
AWS_SECRET_ACCESS_KEY/AWS_SESSION_TOKENGITHUB_TOKEN/NPM_TOKENOPENAI_API_KEY/DOCKER_AUTH- Internal service credentials, API keys, and database URLs
An attacker who achieves any JavaScript execution within the renderer—for example, through a malicious plugin, a cross-site scripting (XSS) flaw, or the terminal hyperlink execution chain—can trivially exfiltrate these secrets to a remote server, leading to cloud account compromise, supply chain attacks, and lateral movement. The exposure is visible even without any code execution by simply opening the "Info" modal in the application, though that requires local access.
Patches
A patch is yet to be available.
Workarounds
Until a patch is released:
- Avoid launching electerm with sensitive environment variables set. Use shell scripts or a dedicated terminal profile that clears secrets before starting the application.
- Do not install plugins from untrusted sources, and audit any installed plugins for network access.
- Keep the renderer context as locked down as possible: disable the remote debugging port, and do not paste untrusted code into the DevTools console.
Resources
- electerm GitHub Repository
- electerm Security Policy
- Vulnerability details originally reported by external researcher (confirmed on v3.7.9, Win10).
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | electerm | all versions | No fix |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for electerm, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
No patched version of electerm has shipped for CVE-2026-43942 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
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 CVE-2026-43942 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2026-43942. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2026-43942 in your dependencies?
O3 Security finds CVE-2026-43942 across npm dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.