---
id: "CVE-2026-124918"
page: "https://infrastack.ai/live/CVE-2026-124918"
kind: "vulnerability"
aliases: ["CVE-2026-124918"]
title: "Firefox: WebRender graphics boundary flaw allows privilege escalation"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["desktop-browser", "firefox", "runtime"]
not_affected_if: ["fully-updated-browser"]
published_at: "2026-11-10T14:17:25+00:00"
first_seen_at: "2026-11-10T14:22:18+00:00"
updated_at: "2026-11-10T14:24:31+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124918", "first_seen_at": "2026-11-10T14:22:18+00:00"}]
exploit_sources: []
---

# Firefox: WebRender graphics boundary flaw allows privilege escalation

Link for people: https://infrastack.ai/live/CVE-2026-124918 (this .md is for agents)

A boundary-condition error in Firefox's WebRender graphics component can let code gain higher privileges than it should have. The description says it is 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 the About Firefox dialog or with `firefox --version`; versions below `160` on the main channel or below `153.7` on ESR are affected.

## Fix

- Firefox `160` (main release)
- Firefox ESR `153.7`

## Timeline

- 2026-11-10T14:22:18+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124918

## From the sources

Privilege escalation due to incorrect boundary conditions in the Graphics: WebRender 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_