---
id: "CVE-2026-124869"
page: "https://infrastack.ai/live/CVE-2026-124869"
kind: "vulnerability"
aliases: ["CVE-2026-124869"]
title: "Firefox: use-after-free in DOM core and HTML component"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "Firefox", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["browser", "firefox", "other"]
not_affected_if: ["fixed-version"]
published_at: "2026-11-10T14:17:19+00:00"
first_seen_at: "2026-11-10T14:22:14+00:00"
updated_at: "2026-11-10T14:26:26+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124869", "first_seen_at": "2026-11-10T14:22:14+00:00"}]
exploit_sources: []
---

# Firefox: use-after-free in DOM core and HTML component

Link for people: https://infrastack.ai/live/CVE-2026-124869 (this .md is for agents)

A use-after-free bug in Firefox's DOM Core and HTML component lets memory be reused after it is freed. The sources do not say what an attacker can gain from it.

_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 Firefox version with Help > About Firefox
- Compare against the fixed versions: Firefox `160` and Firefox ESR `153.7`

## Fix

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

## Timeline

- 2026-11-10T14:22:14+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124869

## From the sources

Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.

---

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