---
id: "CVE-2026-117983"
kind: "vulnerability"
aliases: ["CVE-2026-117983"]
title: "Firefox: use-after-free in Graphics component may allow code execution"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["browsers", "desktop", "firefox", "other"]
not_affected_if: ["already-patched"]
published_at: "2026-10-27T14:16:56+00:00"
first_seen_at: "2026-10-27T14:32:24+00:00"
updated_at: "2026-10-27T14:35:07+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-117983", "first_seen_at": "2026-10-27T14:32:24+00:00"}]
---

# Firefox: use-after-free in Graphics component may allow code execution

A use-after-free bug in the Graphics component of Firefox can be triggered to corrupt memory. The sources do not say what an attacker gains beyond that, so treat the impact as unconfirmed.

_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 run `firefox --version`
- Check the ESR build with `firefox --version` on systems using Firefox ESR; compare against 153.6
- unknown for any other check, as the sources do not say

## Fix

- Update Firefox to `159` or later
- Update Firefox ESR to `153.6` or later
- unknown for any other action, as the sources do not say

## Timeline

- 2026-10-27T14:32:24+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-117983

## From the sources

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

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_