---
id: "CVE-2026-118013"
kind: "vulnerability"
aliases: ["CVE-2026-118013"]
title: "Firefox: use-after-free in image, video and HTML frame layout"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["desktop-browsers", "firefox", "runtime"]
not_affected_if: ["firefox-159-or-later"]
published_at: "2026-10-27T14:16:59+00:00"
first_seen_at: "2026-10-27T14:32:25+00:00"
updated_at: "2026-10-27T14:33:32+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118013", "first_seen_at": "2026-10-27T14:32:25+00:00"}]
---

# Firefox: use-after-free in image, video and HTML frame layout

A use-after-free bug in Firefox's Layout component for images, video and HTML frames can corrupt memory when a page triggers it. The sources do not say what an attacker can run or read after triggering it.

_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 the fixed release `159`.
- unknown for anything beyond the version check; the sources do not give further detail.

## Fix

- Update Firefox to `159` or later.

## Timeline

- 2026-10-27T14:32:25+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-118013

## From the sources

Use-after-free in the Layout: Images, Video, and HTML Frames component. This vulnerability was fixed in Firefox 159.

---

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