---
id: "CVE-2026-117987"
kind: "vulnerability"
aliases: ["CVE-2026-117987"]
title: "Firefox: Graphics use-after-free fixed in Firefox 159 and ESR 153.6"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["desktop-browsers", "firefox", "other"]
not_affected_if: []
published_at: "2026-10-27T14:16:56+00:00"
first_seen_at: "2026-10-27T14:32:24+00:00"
updated_at: "2026-10-27T14:35:03+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-117987", "first_seen_at": "2026-10-27T14:32:24+00:00"}]
---

# Firefox: Graphics use-after-free fixed in Firefox 159 and ESR 153.6

A use-after-free bug in Firefox's Graphics component was fixed in Firefox 159 and Firefox ESR 153.6. The sources do not say what an attacker can do with it.

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

## How to check

- Check the installed Firefox version in the browser's About page or with `firefox --version`
- Check the ESR build with `firefox --version` on ESR installs, comparing against `153.6`

## Fix

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

## Timeline

- 2026-10-27T14:32:24+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-117987

## 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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