---
id: "CVE-2026-124862"
page: "https://infrastack.ai/live/CVE-2026-124862"
kind: "vulnerability"
aliases: ["CVE-2026-124862"]
title: "Firefox: use-after-free in DOM core lets memory be corrupted"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: [{"name": "Firefox", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["browser", "desktop", "firefox", "runtime"]
not_affected_if: ["already-updated"]
published_at: "2026-11-10T14:17:18+00:00"
first_seen_at: "2026-11-10T14:22:13+00:00"
updated_at: "2026-11-10T14:26:36+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124862", "first_seen_at": "2026-11-10T14:22:13+00:00"}]
exploit_sources: []
---

# Firefox: use-after-free in DOM core lets memory be corrupted

Link for people: https://infrastack.ai/live/CVE-2026-124862 (this .md is for agents)

A use-after-free bug in the DOM Core and HTML component of Firefox was fixed in Firefox 160 and Firefox ESR 153.7. The sources do not say what an attacker can achieve with it beyond the memory corruption class.

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

## Affected

- vendor:Firefox affected range not listed fixed no fixed version listed

## How to check

- Check the installed Firefox version in the About Firefox dialog or with `firefox --version`
- Compare it with `160` (Firefox) and `153.7` (Firefox ESR)

## Fix

- Firefox: `160`
- Firefox ESR: `153.7`

## Timeline

- 2026-11-10T14:22:13+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124862

## From the sources

Use-after-free in the DOM: Core & HTML 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_