{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.11.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "electerm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.11.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-49255"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-78"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-02T19:22:31Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Impact\n\nA command injection vulnerability exists in electerm\u0027s file system operations (`rmrf`, `mv`, `cp`) in `src/app/lib/fs.js`. These functions construct shell commands by interpolating file paths directly into command strings without escaping shell metacharacters.\n\n**Vulnerable functions:**\n- `rmrf()` - Uses `rm -rf \"${path}\"` (double quotes, vulnerable to `\"` injection)\n- `mv()` - Uses `mv \u0027${from}\u0027 \u0027${to}\u0027` (single quotes, vulnerable to `\u0027` injection)\n- `cp()` - Uses `cp -r \"${from}\" \"${to}\"` (double quotes, vulnerable to `\"` injection)\n\n**Attack scenario:**\n1. Attacker controls a malicious SSH/SFTP server\n2. Server lists files with shell metacharacters in names (e.g., `file\"$(touch /tmp/pwned)\"`)\n3. Victim connects to the server and performs file operations (remote-to-local transfer, rename on conflict, etc.)\n4. The malicious filename is passed to `rmrf()`, `mv()`, or `cp()` without sanitization\n5. Shell metacharacters break out of the quoted argument and execute arbitrary commands\n\n**Impact includes:**\n- Arbitrary command execution as the electerm desktop user\n- Data exfiltration, malware installation, or system compromise\n- Both POSIX (bash) and Windows (PowerShell) platforms are affected\n\n### Patches\n\n- https://github.com/electerm/electerm/commit/aa778818843b9c083bd711cd04644d102fcb5a42\n\n### Workarounds\n\nIf upgrading is not immediately possible, users can mitigate this vulnerability by:\n1. Only connecting to trusted SSH/SFTP servers\n2. Avoiding remote-to-local file transfers from untrusted sources\n3. Not using the \"rename on conflict\" option when downloading folders from untrusted servers\n4. Manually verifying filenames before performing file operations",
  "id": "GHSA-v5ff-xmfp-p245",
  "modified": "2026-07-02T19:22:31Z",
  "published": "2026-07-02T19:22:31Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/electerm/electerm/security/advisories/GHSA-v5ff-xmfp-p245"
    },
    {
      "type": "WEB",
      "url": "https://github.com/electerm/electerm/commit/aa778818843b9c083bd711cd04644d102fcb5a42"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/electerm/electerm"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "electerm has Command Injection in File System Operations (rmrf, mv, cp)"
}