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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-08 23:09 UTC

CWE

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

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7771 records in the last 180 days details

References

1 reference

URL	Tags
https://github.com/electerm/electerm/security/adv…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
electerm	electerm	Affected: <= 3.8.15	guessed

Show details on NVD website

JSON

To clipboard

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          },
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}

FKIE_CVE-2026-43942

Vulnerability from fkie_nvd - Published: 2026-05-08 04:16 - Updated: 2026-11-11 23:10

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	Mitigation, Vendor Advisory

Impacted products

	Vendor	Product	Version
	electerm_project	electerm	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "electerm",
          "vendor": "electerm",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 3.8.15"
            }
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        }
      ],
      "source": "security-advisories@github.com"
    }
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      "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."
    },
    {
      "lang": "es",
      "value": "electerm es un cliente de terminal/ssh/sftp/telnet/puerto serie/RDP/VNC/Spice/ftp de c\u00f3digo abierto. En las versiones 3.8.15 y anteriores, el gestor IPC getConstants() en src/app/lib/ipc-sync.js serializa el objeto process.env completo y lo env\u00eda al renderizador. Los datos se almacenan como window.pre.env y son accesibles desde cualquier JavaScript que se ejecute en el renderizador (por ejemplo, a trav\u00e9s de la consola de DevTools o un contexto de webview comprometido). Un atacante que logre cualquier ejecuci\u00f3n de JavaScript dentro del renderizador puede exfiltrar trivialmente estos secretos a un servidor remoto, lo que lleva a la compromiso de cuentas en la nube, ataques a la cadena de suministro y movimiento lateral. En el momento de la publicaci\u00f3n, no hay parches disponibles p\u00fablicamente."
    }
  ],
  "id": "CVE-2026-43942",
  "lastModified": "2026-11-11T23:10:00.263",
  "metrics": {
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          "version": "3.1"
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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

{
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      "package": {
        "ecosystem": "npm",
        "name": "electerm"
      },
      "ranges": [
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          "events": [
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              "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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

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

FKIE_CVE-2026-43942

GHSA-37J4-88RP-2F6H

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Vulnerability timeline

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