---
id: "CVE-2026-124854"
page: "https://infrastack.ai/live/CVE-2026-124854"
kind: "vulnerability"
aliases: ["CVE-2026-124854"]
title: "Firefox: DOM Navigation flaw allows privilege escalation in browser"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["browser", "firefox", "runtime"]
not_affected_if: ["already-on-fixed-version"]
published_at: "2026-11-10T14:17:17+00:00"
first_seen_at: "2026-11-10T14:22:13+00:00"
updated_at: "2026-11-10T14:26:43+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124854", "first_seen_at": "2026-11-10T14:22:13+00:00"}]
exploit_sources: []
---

# Firefox: DOM Navigation flaw allows privilege escalation in browser

Link for people: https://infrastack.ai/live/CVE-2026-124854 (this .md is for agents)

A flaw in the DOM Navigation component of Firefox allows privilege escalation. The sources do not say what an attacker gains beyond that, or how it is triggered.

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

## How to check

- Check the Firefox version with `firefox --version` or Help > About Firefox
- Compare against the fixed releases named in the sources: Firefox 160 and Firefox ESR 153.7

## Fix

- Firefox: `160` or later
- Firefox ESR: `153.7` or later

## Timeline

- 2026-11-10T14:22:13+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124854

## From the sources

Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_