---
id: "CVE-2026-124884"
page: "https://infrastack.ai/live/CVE-2026-124884"
kind: "vulnerability"
aliases: ["CVE-2026-124884"]
title: "Firefox: JavaScript garbage collector use-after-free fixed in version 160"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["browsers", "desktop", "firefox", "runtime"]
not_affected_if: ["up-to-date-firefox"]
published_at: "2026-11-10T14:17:21+00:00"
first_seen_at: "2026-11-10T14:22:15+00:00"
updated_at: "2026-11-10T14:26:09+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124884", "first_seen_at": "2026-11-10T14:22:15+00:00"}]
exploit_sources: []
---

# Firefox: JavaScript garbage collector use-after-free fixed in version 160

Link for people: https://infrastack.ai/live/CVE-2026-124884 (this .md is for agents)

A use-after-free bug in the JavaScript garbage collector of Firefox could let a crafted script corrupt memory. The sources state it was fixed in Firefox 160 and Firefox ESR 153.7, but they do not say what an attacker gains beyond memory corruption.

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

## How to check

- Check the installed Firefox version in the About Firefox menu, or run `firefox --version` on the machine.
- Compare it against `160` for Firefox and `153.7` for Firefox ESR.

## Fix

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

## Timeline

- 2026-11-10T14:22:15+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124884

## From the sources

Use-after-free in the JavaScript: GC 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_