---
id: "CVE-2026-118008"
kind: "vulnerability"
aliases: ["CVE-2026-118008"]
title: "Firefox: DOM Navigation flaw allows privilege escalation, fixed in 159"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["browser", "desktop", "firefox", "runtime"]
not_affected_if: ["firefox-159-or-later"]
published_at: "2026-10-27T14:16:58+00:00"
first_seen_at: "2026-10-27T14:32:25+00:00"
updated_at: "2026-10-27T14:33:36+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118008", "first_seen_at": "2026-10-27T14:32:25+00:00"}]
---

# Firefox: DOM Navigation flaw allows privilege escalation, fixed in 159

A flaw in the DOM Navigation component of Firefox lets a page or script gain privileges it should not have. The sources do not describe the exact exploit path or the scope of the privileges gained.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Firefox version: `firefox --version` or Help > About Firefox
- Unknown whether other checks apply; the sources do not say

## Fix

- Update Firefox to `159` or later
- Unknown whether a configuration change is needed as a workaround

## Timeline

- 2026-10-27T14:32:25+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-118008

## From the sources

Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 159.

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