---
id: "CVE-2026-118017"
kind: "vulnerability"
aliases: ["CVE-2026-118017"]
title: "Firefox: use-after-free in SVG component could crash or run code"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["desktop", "firefox", "other"]
not_affected_if: []
published_at: "2026-10-27T14:16:59+00:00"
first_seen_at: "2026-10-27T14:32:25+00:00"
updated_at: "2026-10-27T14:33:28+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118017", "first_seen_at": "2026-10-27T14:32:25+00:00"}]
---

# Firefox: use-after-free in SVG component could crash or run code

A use-after-free bug in Firefox's SVG component lets memory be reused after it is freed. The sources do not say what an attacker can do with it beyond that, and the record gives no severity.

_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 menu or with `firefox --version`
- unknown

## Fix

- Update Firefox to `159` or later
- unknown

## Timeline

- 2026-10-27T14:32:25+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-118017

## From the sources

Use-after-free in the SVG component. This vulnerability was fixed in Firefox 159.

---

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