Vulnerability-Lookup

CVE-2026-43942 (GCVE-0-2026-43942)

Vulnerability from cvelistv5 – Published: 2026-05-08 03:03 – Updated: 2026-05-08 23:09

Title

electerm: Full process.env exposed to renderer via window.pre.env in electerm

Summary

electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. In versions 3.8.15 and prior, 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). An attacker who achieves any JavaScript execution within the renderer can trivially exfiltrate these secrets to a remote server, leading to cloud account compromise, supply chain attacks, and lateral movement. At time of publication, there are no publicly available patches.

Severity ?

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CWE

CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
CWE-312 - Cleartext Storage of Sensitive Information

Assigner

GitHub_M

References

URL

Tags

https://github.com/electerm/electerm/security/adv…

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	electerm	electerm	Affected: <= 3.8.15

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-43942

Vulnerability from fkie_nvd - Published: 2026-05-08 04:16 - Updated: 2026-05-08 19:17

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/electerm/electerm/security/advisories/GHSA-37j4-88rp-2f6h	Vendor Advisory, Mitigation

Impacted products

	Vendor	Product	Version
	electerm_project	electerm	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:electerm_project:electerm:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F236D6E0-CA4E-4FDB-AC8A-4AA1314FE5A7",
              "versionEndIncluding": "3.8.15",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. In versions 3.8.15 and prior, 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). An attacker who achieves any JavaScript execution within the renderer can trivially exfiltrate these secrets to a remote server, leading to cloud account compromise, supply chain attacks, and lateral movement. At time of publication, there are no publicly available patches."
    }
  ],
  "id": "CVE-2026-43942",
  "lastModified": "2026-05-08T19:17:15.643",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-05-08T04:16:23.640",
  "references": [
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      "source": "security-advisories@github.com",
      "tags": [
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        "Mitigation"
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      "url": "https://github.com/electerm/electerm/security/advisories/GHSA-37j4-88rp-2f6h"
    }
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  "weaknesses": [
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          "value": "CWE-200"
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      "source": "security-advisories@github.com",
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}

GHSA-37J4-88RP-2F6H

Vulnerability from github – Published: 2026-05-08 18:37 – Updated: 2026-05-08 18:37

Summary

Electerm's full process.env exposed to renderer via window.pre.env

Details

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_TOKEN
GITHUB_TOKEN / NPM_TOKEN
OPENAI_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).

Severity ?

6.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "electerm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "3.8.15"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-43942"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-200",
      "CWE-312"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-08T18:37:42Z",
    "nvd_published_at": "2026-05-08T04:16:23Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nThe `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).\n\nOn developer and CI machines, `process.env` routinely contains secrets such as:\n\n- `AWS_SECRET_ACCESS_KEY` / `AWS_SESSION_TOKEN`\n- `GITHUB_TOKEN` / `NPM_TOKEN`\n- `OPENAI_API_KEY` / `DOCKER_AUTH`\n- Internal service credentials, API keys, and database URLs\n\nAn attacker who achieves any JavaScript execution within the renderer\u2014for example, through a malicious plugin, a cross-site scripting (XSS) flaw, or the terminal hyperlink execution chain\u2014can 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.\n\n### Patches\n\nA patch is yet to be available.\n\n### Workarounds\n\nUntil a patch is released:\n- Avoid launching electerm with sensitive environment variables set. Use shell scripts or a dedicated terminal profile that clears secrets before starting the application.\n- Do not install plugins from untrusted sources, and audit any installed plugins for network access.\n- Keep the renderer context as locked down as possible: disable the remote debugging port, and do not paste untrusted code into the DevTools console.\n\n### Resources\n- [electerm GitHub Repository](https://github.com/electerm/electerm)\n- [electerm Security Policy](https://github.com/electerm/electerm/security)\n- Vulnerability details originally reported by external researcher (confirmed on v3.7.9, Win10).",
  "id": "GHSA-37j4-88rp-2f6h",
  "modified": "2026-05-08T18:37:42Z",
  "published": "2026-05-08T18:37:42Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/electerm/electerm/security/advisories/GHSA-37j4-88rp-2f6h"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43942"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/electerm/electerm"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Electerm\u0027s full process.env exposed to renderer via window.pre.env"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-43942 (GCVE-0-2026-43942)

FKIE_CVE-2026-43942

GHSA-37J4-88RP-2F6H

Impact

Patches

Workarounds

Resources

Tags

Sightings

Nomenclature