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CVE-2026-43941
critical
CVSS 9.6
Vulnerability in electerm (CVE-2026-43941)
Summary
vulnerability in electerm (CVE-2026-43941). Successful exploitation can lead to full system takeover. Exploitable via ``shell.openExternal``.
AI summary openai / gpt-4o
Electerm has a vulnerability that allows attackers to execute malicious actions when a user clicks a specially crafted link. This could include leaking important data or executing unauthorized code. All versions are currently affected, and no patch is available yet. It is advisable to avoid clicking on links presented during sessions with unknown parties.
Electerm is vulnerable due to `shell.openExternal` executing URLs without validating protocols, which attackers can exploit for arbitrary code execution or file access. All versions are affected, with no available patch as of now. As a workaround, avoid clicking links in terminal sessions from untrusted servers, disable hyperlink rendering, or use terminal applications with URI filtering capabilities.
❓ What is the problem
Electerm terminal hyperlink handler passes URLs to `shell.openExternal` without protocol validation.
📍 Affected scope
Terminal hyperlink handling in Electerm.
🔥 Severity
Critical severity with possibility of arbitrary code execution or local file access when user clicks a malicious link.
🔧 How to fix
Monitor Electerm's GitHub for patch updates; none released as of v3.7.9.
🛡️ Workaround
Avoid clicking links from untrusted servers, disable hyperlink rendering in Electerm, use terminal apps with URI filtering.
🔍 Detection
Monitor terminal output; avoid clicking unexpected URLs.
Related past incidents Similar incidents extracted from past CVEs
A similar issue where malicious links led to RCE via protocol handlers.
ActiveX control vulnerability triggered via malicious link causing RCE.
Adobe Acrobat issue leveraged URL handling for code execution.
If this happens at your company Expected impact per business scenario
📌 SaaS applications accessed through Electerm.
Unauthorized code could run, compromising user data and operations.
📌 Corporate network access via SSH.
Malicious actors may execute code, gaining access to sensitive internal systems or leaking data.
📌 Remote IT administration using Electerm.
Potential for escalation privileges and unauthorized data access.
Recommended action
Inform users of the risk and implement controls to limit exposure to untrusted links.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'electerm' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で `electerm` を grep し、稼働しているサービス・バージョンを把握する。
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7Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 3 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
npm
electerm
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]