# Electerm Security Vulnerability: RCE via malicious SSH server filename in openFileWithEditor

Advisory record · `GHSA-q4p8-8j9m-8hxj`

- **Identifiers:** `GHSA-q4p8-8j9m-8hxj` · `CVE-2026-43943`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **Weakness (CWE):** [CWE-78](https://cwe.mitre.org/data/definitions/78.html) · [CWE-88](https://cwe.mitre.org/data/definitions/88.html)
- **Tags:** [Command injection](https://agentprime.io/advisories/tag/command-injection.md)
- **Published:** 8 May 2026
- **Updated:** 8 May 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 8 May 2026, 18:43 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `electerm` (npm): affected `<3.7.9`; fixed in `3.7.9`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 7.8 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0016, the 5th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 8 May 2026, 04:16 UTC: [Confirmed by NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-43943)

## Sources

- [GitHub Advisory Database: GHSA-q4p8-8j9m-8hxj](https://github.com/advisories/GHSA-q4p8-8j9m-8hxj)
- [OSV: GHSA-q4p8-8j9m-8hxj](https://osv.dev/vulnerability/GHSA-q4p8-8j9m-8hxj)
- <https://github.com/electerm/electerm/security/advisories/GHSA-q4p8-8j9m-8hxj>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-43943>
- <https://github.com/electerm/electerm/commit/24ce7103e264cffe6eb5476c0506a2379e6f8333>
- <https://github.com/electerm/electerm>
- <https://github.com/electerm/electerm/releases/tag/v3.7.9>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-q4p8-8j9m-8hxj>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-q4p8-8j9m-8hxj/>. Everything for agents: <https://agentprime.io/llms.txt>.