---
id: "CVE-2026-124907"
page: "https://infrastack.ai/live/CVE-2026-124907"
kind: "vulnerability"
aliases: ["CVE-2026-124907"]
title: "Firefox: use-after-free in WebGL canvas lets sandboxed code escape"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["browser", "desktop", "firefox", "other"]
not_affected_if: ["firefox-160-or-later", "firefox-esr-153.7-or-later"]
published_at: "2026-11-10T14:17:24+00:00"
first_seen_at: "2026-11-10T14:22:17+00:00"
updated_at: "2026-11-10T14:24:44+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124907", "first_seen_at": "2026-11-10T14:22:17+00:00"}]
exploit_sources: []
---

# Firefox: use-after-free in WebGL canvas lets sandboxed code escape

Link for people: https://infrastack.ai/live/CVE-2026-124907 (this .md is for agents)

A use-after-free bug in Firefox's WebGL canvas graphics component allows privilege escalation and escape from the browser sandbox. Fixed in Firefox 160 and Firefox ESR 153.7.

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

## How to check

- Check the installed Firefox version in Firefox's About dialog (Help > About Firefox).
- Compare against `160` for Firefox and `153.7` for Firefox ESR.

## Fix

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

## Timeline

- 2026-11-10T14:22:17+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124907

## From the sources

Privilege escalation, sandbox escape due to use-after-free in the Graphics: CanvasWebGL 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_