---
id: "CVE-2026-117989"
kind: "vulnerability"
aliases: ["CVE-2026-117989"]
title: "Firefox: use-after-free in Graphics component may let attackers run code"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["browser", "desktop", "firefox", "runtime"]
not_affected_if: ["already-on-fixed-version"]
published_at: "2026-10-27T14:16:56+00:00"
first_seen_at: "2026-10-27T14:32:24+00:00"
updated_at: "2026-10-27T14:34:59+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-117989", "first_seen_at": "2026-10-27T14:32:24+00:00"}]
---

# Firefox: use-after-free in Graphics component may let attackers run code

A use-after-free bug in Firefox's Graphics component lets memory be reused after it is freed. The sources do not say what an attacker gets beyond that, and the fix ships in Firefox 159 and Firefox ESR 153.6.

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

## How to check

- Run `firefox --version` (or check About Firefox) and compare against `159` for the release channel or `153.6` for ESR
- unknown

## Fix

- Update Firefox to `159` or later, or Firefox ESR to `153.6` or later

## Timeline

- 2026-10-27T14:32:24+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-117989

## From the sources

Use-after-free in the Graphics component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6.

---

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